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4 #10357 (i1534)—Active Algebra—Algebra I, Unit 1
Table of Contents for the Entire YearUnit 1: Algebraic Expressions and IntegersLesson 1: Introduction to Algebra ILesson 2: Writing Algebraic ExpressionsLesson 3: Properties and Order of
OperationsLesson 4: Order of OperationsLesson 5: Adding Integers with ChipsLesson 6: Multiplying and Dividing IntegersLesson 7: Mixed IntegersLesson 8: Integers Review 1Lesson 9: Integers Review 2Lesson 10: Collecting Like TermsLesson 11: Distributing and Collecting 1Lesson 12: Distributing and Collecting 2Lesson 13: Distributing and Collecting
ReviewLesson 14: Writing One-Variable EquationsLesson 15: Writing Expressions and
Equations 1Lesson 16 Writing Expressions and
Equations 2Lesson 17: Integers Unit Test
Unit 2: Linear EquationsLesson 18: Solving Linear Equations with
Cups and Chips 1Lesson 19: Solving Linear Equations with
Cups and Chips 2Lesson 20: Solving Equations 1Lesson 21: Solving Equations 2Lesson 22: Solving Equations with Fractions 1Lesson 23: Solving Equations with Fractions 2Lesson 24: Algebra Applications with
Angles 1Lesson 25: Solving Equations with Fractions 3Lesson 26: Algebra Applications with
Angles 2Lesson 27: Solving Literal Equations 1Lesson 28: Solving Literal Equations 2Lesson 29: Solving Literal Equations 3Lesson 30: Solving Literal Equations 4Lesson 31: Linear Equations Test
Unit 3: Probability, Percent, and ProportionLesson 32: Percent of Region 1Lesson 33: Percent of Region 2Lesson 34: ProbabilityLesson 35: Fraction-to-Decimal ConversionsLesson 36: ReviewLesson 37: Percent and Probability 1Lesson 38: Percent and Probability 2Lesson 39: ProportionsLesson 40: Unit Review 1Lesson 41: Unit Review 2 Lesson 42: Probability, Percent, and
Proportion Test
Unit 4: GraphingLesson 43: Coordinate PlaneLesson 44: Relations and FunctionsLesson 45: Equations as Relations 1Lesson 46: Equations as Relations 2Lesson 47: Lines and CurvesLesson 48: FunctionsLesson 49: Writing Equations from PatternsLesson 50: Mid-Unit Review 1Lesson 51: Mid-Unit Review 2
Lesson 52: Slope 1Lesson 53: Slope 2Lesson 54: Slope 3Lesson 55: Point-Slope Form 1Lesson 56: Point-Slope Form 2Lesson 57: Slope-Intercept FormLesson 58: Slope Formulas 1Lesson 59: Slope Formulas 2Lesson 60: Graphing Linear EquationsLesson 61: Parameter Changes 1Lesson 62: Parameter Changes 2Lesson 63: Graphing Unit Review and Test
Unit 5: Inequalities Lesson 64: Graphing InequalitiesLesson 65: Solving Multistep InequalitiesLesson 66: Union and IntersectionLesson 67: Compound Inequalities 1Lesson 68: Compound Inequalities 2Lesson 69: Compound Inequalities 3Lesson 70: Absolute Value Inequalities 1Lesson 71: Absolute Value Inequalities 2Lesson 72: Graphing Two-Variable
Inequalities
Unit 6: Systems of Equations &Semester ReviewLesson 73: Comparing SystemsLesson 74: Substitution Method 1Lesson 75: Substitution Method 2Lesson 76: Addition Method 1Lesson 77: Addition Method 2Lesson 78: Solving Systems of EquationsLesson 79: Review Systems of Equations 1Lesson 80: Review Systems of Equations 2Lesson 81: Review Systems of Equations 3Lesson 82: Review Systems of Equations 4Lesson 83: Review Systems of Equations 5Lesson 84: Standardized Test PracticeLesson 85: Graphing, One-Variable
Equations, and Mixed ObjectivesLesson 86: Graphing and Two-Variable
EquationsLesson 87: Final Semester ReviewLesson 88: Semester 1 Exam
Unit 7: PolynomialsLesson 89: Multiplying MonomialsLesson 90: Dividing MonomialsLesson 91: Mixed Operations with
MonomialsLesson 92: Adding Polynomials with Algebra
TilesLesson 93: Multiplying BinomialsLesson 94: Distributing MonomialsLesson 95: Representing Geometric Figures
with Algebraic ExpressionsLesson 96: Self-Paced Geometry 1Lesson 97: Self-Paced Geometry 2Lesson 98: Self-Paced Geometry 3Lesson 99: Self-Paced Geometry 4Lesson 100: Self-Paced Geometry 5Lesson 101: Polynomials Unit ReviewLesson 102: Polynomials Unit Test
Unit 8: FactoringLesson 103: Factoring the Greatest Common
FactorLesson 104: Factoring Trinomials
(Third Term Negative)
Lesson 105: Factoring Trinomials (Third Term Positive)
Lesson 106: Factoring Trinomials withAlgebra Tiles
Lesson 107: Factoring All Types of Problems 1Lesson 108: Factoring Special Types of
ProblemsLesson 109: Factoring All Types of Problems 2Lesson 110: Solving Quadratic Equations 1Lesson 111: Solving Quadratic Equations 2Lesson 112: Factoring Unit Review 1Lesson 113: Factoring Unit Review 2Lesson 114: Factoring Unit TestLesson 115: Solving Rational Equations 1Lesson 116: Solving Rational Equations 2Lesson 117: Solving Rational Equations 3
Unit 9: Radicals and QuadraticsLesson 118: Using the Pythagorean TheoremLesson 119: Pythagorean TriplesLesson 120: Simplifying Radical Expressions 1Lesson 121: Simplifying Radical Expressions 2Lesson 122: Adding Radical ExpressionsLesson 123: Multiplying Radical ExpressionsLesson 124: Radical OperationsLesson 125: Solving Radical Equations 1Lesson 126: Solving Radical Equations 2Lesson 127: Radicals Unit Review and TestLesson 128: The Properties of Parabolas Lesson 129: Identifying the Axis of Symmetry
and the Vertex Lesson 130: Graphing Quadratic Equations 1 Lesson 131: Graphing Quadratic Equations 2 Lesson 132: The Quadratic Formula 1 Lesson 133: The Quadratic Formula 2 Lesson 134: Graphing and Solving Quadratic
Equations Lesson 135: Quadratics Unit Assessment
Unit 10: Rational Expressions &Semester ReviewLesson 136: Simplifying Rational Expressions 1Lesson 137: Simplifying Rational Expressions 2Lesson 138: Multiplying and Dividing
Rational ExpressionsLesson 139: Rational Expressions Mid-Unit
ReviewLesson 140: Rational Expressions Mid-Unit
TestLesson 141: Adding Rational Expressions 1Lesson 142: Adding Rational Expressions 2Lesson 143: Adding Rational Expressions QuizLesson 144: Solving Rational Equations 1Lesson 145: Solving Rational Equations 2Lesson 146: Solving Rational Equations QuizLesson 147: Rational Expressions Unit
Review 1Lesson 148: Rational Expressions Unit
Review 2Lesson 149: Rational Expressions Unit TestLesson 150: Game Day!Lesson 151: Standardized Practice PosttestLesson 152: Creating Algebra Aces GamesLesson 153: Playing Algebra Aces GamesLesson 154: Algebra I Second Semester
ReviewLesson 155: Algebra I Second Semester Exam
5#10357 (i1534)—Active Algebra—Algebra I, Unit 1
IntroductionThis curriculum is intended to give schools a foundation for developing a successfulAlgebra I program. There are many factors involved in developing a program. Theteacher is encouraged to use this curriculum, while addressing the factors below, to helpmake Algebra I accessible to all students.
These factors include the following:
• Teachers’ philosophies
• Having high expectations of students
• Horizontal teaming as well as K–12 vertical teaming
• Supportive administration
• An adequate amount of instructional time (90 minutes a day is recommended)
• Classroom management skills
• Regular team-planning time
• Training teachers in the use of manipulatives, cooperative learning, and the use of the graphing calculator
PowerPoint Slide ShowsTo support the teaching of this unit, there are PowerPoint presentations of some of thelessons. These slides shows are intended to give guidance on how to introduce newtopics to students. The presentations provide a prepared copy of the notes from thelesson plans so that the notes do not have to be recopied. The slide shows also serve asexcellent visual aids for English-language learners (ELL). There is a list of all thepresentations provided on pages 57–59 of the Teacher Resource Guide.
Transparencies Folder on the CDThis unit has a number of word problems to help students apply their learning from theunit. To complete these problems, create transparencies from the PDFs on the TeacherResource CD, or simply copy the pages and give them to the students. The pages arelocated in the Transparencies folder on the CD. Specific filenames are provided withineach lesson’s Materials list.
Standardized Test PreparationTo maximize students’ scores on standardized tests, it is imperative that the studentsreview test items throughout the year. It is recommended that the teacher maketransparencies of the Standardized Test Preparation activity sheets. These two-page files are located in the Standardized Test Prep folder on the CD. Teachersshould try to review one sheet per unit with the class. After reviewing all of theproblems on an overhead, the teacher should assign that sheet as a homeworkassignment, making sure students have a few days to work on it before it is due.
If it is difficult to complete one sheet within each unit, the teacher should make sure tocover Standardized Test Preparation activity sheets 1–6 by the end of the firstsemester. Sheets 7–10 should be completed before any state standardized tests are givenduring the second semester.
6 #10357 (i1534)—Active Algebra—Algebra I, Unit 1
Introduction (cont.)
Algebridge TutorialsEven though a student may have done poorly in eighth-grade mathematics, he or she isexpected to pass Algebra I in the ninth grade. To help bridge the gap of knowledgestudents may have in mathematics, teachers may want to hold Algebridge Tutorials.
Algebridge Tutorials should be held from the third through the ninth week of school.The teacher is responsible for using the assessments and activity sheets in Units 1 and 2to determine which students will benefit from participating in the program. The teachershould then hold tutorials to reteach the objectives that students did not master in class.The tutorials can be held before school, after school, or on Saturdays.
After covering the objectives again, give students the opportunity to retake any quizzesor tests. Students can earn a new replacement grade of up to 100%. The Algebridgefolder on the Teacher Resource CD includes a new version of each quiz or test. Byreteaching the objectives from these units, the teacher prepares students to participatein the lessons for the rest of the year. This tutorial program requires a commitment onthe teacher’s part, but the results can be outstanding.
Some of the questions that Algebra I teachers should address before beginning theprogram include the following:
• Will the school provide transportation?
• Do the teachers want the highest retake grade to be 100%, or do they want it tobe lower? (The higher the retake grade, the more participation there will be inthe program.)
• The teachers should also consider the issue of averaging the first semester andsecond semester grades if the school holds Algebridge Tutorials. The firstsemester grade will be higher than it would have been if the school did not offerthe program.
Professional Development DVDIncluded in this kit is the Professional Development DVD. This DVD includes segmentsshowing how to use manipulatives with the students. The teacher should watch thevideo before teaching any of the lessons with manipulatives or games.
Teacher Resource CDThe Teacher Resource CD features many important components that support this unit. Itcontains a second copy of each assessment. The teacher can use the second copies aspretests or during the posttest to prevent copying. All of the guided practice sheets areprovided on the CD. If the teacher does not want to use the student consumable, theGuided Practice Book, he or she will need to print these files for students. Also includedon the CD are files necessary to play the games within this unit, if applicable. Manyapplication problems are provided within the Transparencies folder. Completing theseproblems with students will help students learn how to apply the abstract concepts toreal-world situations. For specific information about the contents of the CD, see theTeacher Resource Guide (pages 84–86). Information about the necessary materials is alsoprovided with each lesson.
7#10357 (i1534)—Active Algebra—Algebra I, Unit 1
Introduction (cont.)
Grading ProceduresIt is up to the teacher and the administrator to determine how to assess student work.The following information is intended to be helpful in this decision-making process. Thechart only lists the tests and quizzes from this unit. A comprehensive plan for thegrading procedures is included in the Teacher Resource Guide (pages 39–55).
Homework, Classwork, and Guided Practice SheetsGive a completion grade (see below) for each assignment. Subtract each completiongrade from a starting grade of 100%. At the end of this unit, record each student’scompletion grade as a quiz grade. Allow students one free late assignment to minimizetime spent evaluating students’ excuses. To make grading easier, have studentsexchange papers and check for completion. Then, use the chart in the Teacher ResourceGuide (page 47) to record student scores.
Completion Grade–0 if all problems were attempted–3 if half of the problems were attempted–6 if no problems were attempted
NotesCheck students’ notes halfway through this unit. Make students revise their notes if they are not correct, neat, and in order. Give a quiz grade. Grade again at the end of the unit, but do not give a quiz grade. Instead, if a student’snotes are in good condition, drop his or her lowest quiz score.
Assessments—Unit 1
For Example100 (everyone starts here)
–3 p.7 (only half was attempted)
–6 p.8 (no work was attempted)
–0 p.9 (all work was attempted)
–3 p.10 (only half was attempted)
88
Essay quiz grade of 100 if students followed instructions
Algebraic Expressions and Operations Test 4 pts. each problem
Adding Integers Quiz 3 pts. each problem
Speed Quiz Practice not for a grade
Multiplying and Dividing Integers Quiz 1 pt. each problem
Speed Quiz 1 1 pt. each problem
Integers Packet quiz grade; 25 pts. per page
Mixed Integers Quiz 1 pt. each problem
Speed Quiz 2 1 pt. each problem
Speed Quiz 3 1 pt. each problem
Speed Quiz 4 1 pt. each problem
Collecting Like Terms Quiz 5 pts. each problem
Speed Quiz 5 1 pt. each problem
Mixed Integers Test 1 pt. each problem; +1 each for bonus
Speed Quiz 6 1 pt. each problem
Distributing and Collecting Quiz 10 pts. each problem
Speed Quiz 7 1 pt. each problem
Writing Equations quiz grade;Packet credit for completion
Distributing and Collecting Test 1 pt. each problem
Integers Unit Test 1 to 25—1 pt. each; 26 to 35—6 pts. each;36 to 38—1 pt. each for first two lines, 3 pts. for equation
8 #10357 (i1534)—Active Algebra—Algebra I, Unit 1
Introduction (cont.)
How to Use This Program
Teacher Resource GuideNCTM standards correlation • Outline of lessons for entire course • Classroom management and differentiation suggestions • Assessmentsuggestions and data-driven instruction charts • Graphing calculatorinformation • Steps for preparing games and manipulatives • Contents of the Teacher Resource CD • Segments on the Professional Development DVD
Lesson PlansContent standard • Specific materials list • Step-by-step procedure • Notes and practice problems • Review • Reteaching suggestions • Teacher tips • Assessment appendix • Games appendix • Answer keys
Transparencies• The kit includes 40 overhead transparencies. These are utilized in various
lessons throughout the program. So, the teacher may or may not have to useany in a given unit.
• The transparencies are located in a folder within the Active Algebra box. For teacher reference, each transparency features the unit and lesson numbersin the header.
Guided Practice Book• All necessary activity sheets for the students are provided in the student
Guided Practice Book. There are page references to this book within thelessons. The activity sheets are also provided on the Teacher Resource CD.
• Call 888-333-4551 or visit http://www.tcmpub.com to order more copies of this consumable product.
Teacher Resource CD PowerPoint slide shows • Application transparencies • Standardized testpreparation sheets • Algebridge assessments • Form B of all assessments •Preparation materials for games
Professional Development DVDDemonstrations and explanations for how to complete the lessons that involvemanipulatives or games.
Teacher Tips
Notes
Schedule
Assessment
Practice
Assignment
CooperativeGroups
OverheadTransparency
Transparencyin a CD File
CD File
Lesson Plan Icons The followingicons are usedthroughout thelessons to guideteachers in theirplanning.
MathematicsGame
Lesson Description• Adds, subtracts, multiplies, and divides integers and rational
numbers. (McREL Mathematics Standard)
• Students will use manipulatives to add integers.
Materials• PowerPoint folder on the CD—Adding Integers with Chips
(lessn05.ppt) (optional)
• Overhead chips
• Bag of 15 bicolor chips for each student
• Guided Practice Book—Adding Integers 1 (page 7; intgrs01.pdf)
• Guided Practice Book—Adding Integers 2 (page 8; intgrs02.pdf)
ProcedureStep 1 Collect students’ graph paper and highlighters to keep in the
classroom so they are always available when needed.
• Check to see how many students have their notes books. Let them know that their notebooks or folders (with up-to-date notes and extra paper) will be checked later this week.
• Remind them of the due date for their essays.
Step 2 Review for the Algebraic Expressions and Operations Test,which is tomorrow.
• Review the properties. Have students study their notes. Then, make up some examples, using both the algebraic and numeric properties.
Step 3 Review the order of operations by solving these problems together in preparation for the test.
a. 42 ÷ 2[6 – (2 – 1)2]3
– 3 + 4 = 1,001
b. a = 2, b = 3, c = 4ac + bc2 = 56
24 #10357 (i1534)—Active Algebra—Algebra I, Unit 1
Steps 1–430 min.
Steps 7–925 min.
Steps 5–620 min.
Steps 10–1215 min.
Lesson
5 Adding Integers with ChipsAlgebraic Expressions and Integers Unit
Practice
Lesson
5Adding Integers with ChipsAlgebraic Expressions and Integers Unit
25#10357 (i1534)—Active Algebra—Algebra I, Unit 1
Procedure (cont.)
Step 4 Go over the Notes on Adding Integers with Chips(pages 25–27).
• Practice saying these notes until you feel comfortable.
• There will be some students who protest. Usually thesestudents cannot add integers with pencil and paper either.Just tell them to humor you. This activity will help them betterunderstand the process of adding integers.
• Give a completion grade at the end of the day for their notes.
• These notes are provided as part of the lesson’s PowerPointslide show on the CD (lessn05.ppt).
Notes on Adding Integers with Chips
• Have students draw the following in their notes.
yellow (+) red (–) zero pair
• Have a “pop quiz” by holding up a yellow chip and asking,“What does this stand for?” Then, do the same for the red chipand the zero pair.
• As the students watch, demonstrate the process for the first fiveproblems. Talk them through each step as you work. Do notdistribute chips yet.
• Call on at least three students as you work on each problem.
Example 1
2 + 4 = 6 (first-grade problem)
What do I put for 2? (two yellows)
What do I put for 4? (four yellows)
What is the answer? (six yellows, or 6)
Lesson
5 Adding Integers with ChipsAlgebraic Expressions and Integers Unit
26 #10357 (i1534)—Active Algebra—Algebra I, Unit 1
Notes on Adding Integers with Chips (cont.)
Example 2
–2 + 1 = –1
Example 3
–2 + 3 = 1
After setting up theproblem, pull one zeropair off to the side.
–2 + 1
There is one red chip left.So, the answer is –1.
After setting up the problem, pull two zero pairs off tothe side.
There is one yellow chip left.So, the answer is 1.
–2 + 3
Lesson
5Adding Integers with ChipsAlgebraic Expressions and Integers Unit
27#10357 (i1534)—Active Algebra—Algebra I, Unit 1
Notes on Adding Integers with Chips (cont.)
Example 4
3 – 1 = 2
Example 5
2 – 5 = –3
After setting up theproblem, pull one zeropair off to the side.3 – 1
There are two yellow chips left.So, the answer is 2.
Official Definition ofSubtract—Add theopposite. This means beginwith a yellow to set up theproblem. Then, change itto red.
After setting up theproblem, pull two zeropairs off to the side.2 – 5
There are three red chips left.So, the answer is –3.
Official Definition ofSubtract—Add theopposite. This meansbegin with five yellowsto set up the problem.Then, change them tored.
Lesson
5 Adding Integers with ChipsAlgebraic Expressions and Integers Unit
28 #10357 (i1534)—Active Algebra—Algebra I, Unit 1
Procedure (cont.)
Step 5 Solve these eight problems using the overhead chips. Students canstop taking notes at this time if they are starting to understand theprocess.
• Call on students to help solve the problems. They should tellyou how many chips of each color to use. Also have them callout the answers after the problem is set up.
• Continue to put yellow chips and change them to red toindicate subtraction. Stress that subtraction is adding theopposite.
c. 1 – 6 = –5
d. –5 – 2 = –7
e. –1 – 1 = –2
f. –3 + 4 = 1
g. –2 – 2 = –4
h. 4 – 6 = –2
i. –3 + 4 = 1
j. –6 – 2 = –8
Step 6 If time allows, let students come up and use the manipulatives onthe overhead with you to solve the following problems.
k. 3 – 5 = –2
l. –1 + 3 = 2
m. –3 – 3 = –6
n. –1 – 3 = –4
o. 1 – 4 = –3
Practice
Practice
Lesson
5Adding Integers with ChipsAlgebraic Expressions and Integers Unit
29#10357 (i1534)—Active Algebra—Algebra I, Unit 1
Procedure (cont.)
Step 7 When it is clear that all students know what to do, distribute theAdding Integers 1 activity sheet. Then, give each student his or her own bag of 15 chips.
Teacher TipTell students not to show “adding the opposite” on their papers.They should think only about the colors of the chips and writethe answer. This will help them as algebra gets more difficult.For example, with 3 – 5, encourage them not to write 3 + –5.
Step 8 Before beginning . . .
• Tell students to humor you; do not let students do the activitysheet without chips.
• Tell students that if they finish quickly, it means that they didnot use chips. You will take the activity sheet away and givethem another one.
Step 9 After they are finished . . .
• Have each student compare answers with one other personand sign the bottom of the activity sheet.
• After all students are finished, call out the answers to theactivity sheet, and pick up the papers.
Step 10 The next step is to connect from the manipulatives (concrete) tothe abstract. Explain to students that they will not have their bagsof chips in Algebra II or real-life situations. So, discuss how to addintegers without chips.
Do not use chips to solve this problem.
p. –3 + 2Ask, “Is there more red or yellow?” There is more red. So, the answer is –1.
Assignment
Lesson
5 Adding Integers with ChipsAlgebraic Expressions and Integers Unit
30 #10357 (i1534)—Active Algebra—Algebra I, Unit 1
Procedure (cont.)
Step 11 Do not use chips to solve the problems below.
q. –3 – 1 =Discuss the process of putting out a yellow chip for the –1and then changing it to red. Say, “They are all red. How many red chips are there?” There are four red chips,so the answer is –4.
r. –3 + 5 = 2
s. –1 – 1 = –2
t. 4 – 8 = –4
u. –2 + 8 = 6
v. –6 + 10 = 4
w. –3 – 5 = –8
Teacher TipIn examples p through u, continue to ask, “Are there more redor yellow chips? If the chips are all red, how many red chips are there?”
Step 12 Distribute the Adding Integers 2 activity sheet for students tocomplete without using chips.
• As students finish, have them compare their answers withpartners and sign their names on the bottoms of their activitysheets.
• If you have run out of time, assign this sheet as homework,and have students compare sheets at the beginning of the next lesson.
Assignment
Practice
Practice
Practice
Assessment
Lesson
91Mixed Operations with MonomialsPolynomials Unit
17#10357 (i1543)—Active Algebra—Algebra I, Unit 7
Lesson Description• Understands the general properties and characteristics of many
types of functions, including polynomials. (McREL MathematicsStandard)
• Students will review adding and multiplying monomials.
Materials• Appendix A: Assessments—Multiplying Monomials Quiz
(page 52; asess54a.pdf)• Guided Practice Book—Adding and Multiplying Monomials 1
(page 158; poly01.pdf)
ProcedureStep 1 Review how to multiply monomials by asking student volunteers
to do the following problems on the overhead:
a. m(m2)(m5) = m8
b. ( m)2 = m2
c. (–3p)(2p2)2 = –12p5
Step 2 Give the Multiplying Monomials Quiz.
• There are two versions of this assessment. Form A is inAppendix A: Assessments (page 52). Form B is on the CD(asess54b.pdf). You can use both versions at the same time todiscourage copying, or use one version as the initial assessmentand the other version as the makeup assessment.
• Answers for both versions of the quiz are on page 68.
Step 3 Review scientific notation and standard notation.
• There will be an assignment on scientific notation andstandard notation in a few days.
d. 8,640,000 = 8.64 x 106
e. .00007 = 7.0 x 10–5
f. 4.63 x 103 = 4,630
g. 3.37 x 10–2 = .0337
23
49
Steps 1–220 min.
Step 625 min.
Steps 3–515 min.
Step 730 min.
Practice
Lesson
91 Mixed Operations with MonomialsPolynomials Unit
18 #10357 (i1543)—Active Algebra—Algebra I, Unit 7
Procedure (cont.)
Step 4 Review the definitions for the following vocabulary words, whichwere introduced in the Notes on Polynomials in Lesson 90.
• monomial—1 term
• binomial—2 terms
• trinomial—3 terms
• polynomial—a monomial or a sum of monomials
Step 5 Go over adding monomials, and review multiplying monomials on the overhead or board.
• Stress to students that terms must look alike to add them.They do not have to look alike to multiply them.
Adding Monomials
h. 2x + 3x = 5x
i. 6x2 – 8x2 = –2x2
j. 3xy2 – 6xy2 + 4x2y = –3xy2 + 4x2y
k. 2x + 5y = 2x + 5y
l. –2x – 2x = –4x
Multiplying Monomials
m. 2x(3x) = 6x2
n. –6x(–3x2) = 18x3
o. 4mn2(–3m2n) = –12m3n3
p. –2p(4p – 6q) = –8p2 + 12pq
q. –3x3(4y) = –12x3y
Assignment
Practice
Lesson
91Mixed Operations with Monomials Polynomials Unit
19#10357 (i1543)—Active Algebra—Algebra I, Unit 7
Procedure (cont.)
Step 6 Review mixed operations (adding and multiplying).
• Place students into groups of four and give each group twoproblems. Have groups present the problems to the class usingthe overhead projector or board.
r. 4x – 6x = –2x
s. 4x(6x) = 24x2
t. xy(–3x2y) = –3x 3y 2
u. –4mn – 6mn = –10mn
v. –3m(2m – 4n) = –6m2 + 12mn
w. –3x2y – 6xy2 + 4x2y = x2y – 6xy 2
x. –6mn – 8mn = –14mn
y. –6mn(–8mn) = 48m2n2
Step 7 Create groups of three to four students to complete theAdding and Multiplying Monomials 1 activity sheet.
Teacher TipsBefore you put the students into groups, remind them:
• Use a “ruler voice.” (Their voices should only be heard 12 inches away.)
• They should immediately choose leaders for their groups.
• After all students have finished at least 10–15 problems, theleader calls out his or her answers. Everyone needs to agree on the answers.
When group members agree on all the answers:
• They should all come to you with their papers.
• Shuffle the papers and pick one to grade.
• Assign a grade based on the number of correct answers.
• You may want to give a reward to the group that misses thefewest problems.
Cooperative
Groups