todays plan: -entry task & correct homework -variables and expressions -practice learning...
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Today’s Plan:-Entry Task & Correct Homework-Variables and Expressions-Practice
Learning Target:-I will evaluate algebraic expressions.
Entry Task
9/14/10 Variables and Expressions
Evaluate.
1. 5(7) – 1
2. 7(18 – 11)
3. 22 + 17 8 + 3
4. 36 + 15(40 – 35)
34
49161
111
Today’s Plan:-Entry Task & Correct Homework-Variables and Expressions-Practice
Learning Target:-I will evaluate algebraic expressions.
9/14/10 Variables and Expressions
Classify the following as expressions or equations. Use the examples as a guide.
Expressions Equations y + 3 – 5 6 ÷ 2 + y = 3
2 + 3 -10
x + 3 - y
4 ÷ 2 f ÷ 2 +1= 2
4 × 10 = 40
n × p = w
n × p + w
Evaluate k + 9 for each value of k.
Course 2
2-7 Variables and Algebraic Expressions
A. k = 5 k + 9
5 + 9
14
Substitute 5 for k.Add.
B. k = 2 k + 9
2 + 9 Substitute 2 for k.
11 Add.
Insert Lesson Title Here
Course 2
2-7 Variables and Algebraic Expressions
Evaluate a + 6 for each value of a.
A. a = 3 a + 6
3 + 6
9
Substitute 3 for a.Add.
B. a = 5 a + 6
5 + 6 Substitute 5 for a.
11 Add.
Insert Lesson Title Here
Course 2
2-7 Variables and Algebraic Expressions
Evaluate.
A. a = 4 5 - a + 6
B. a = 5 5 - a + 6
Course 2
2-7 Variables and Algebraic Expressions
REMEMBER: Multiplication and division can be written in different ways.
Multiplication Division
7t 7 · t
7(t) 7 t
t 2
t ÷ 2
t/2
ab a · ba(b) a b
sr
s ÷ rs/r
Today’s Plan:-Entry Task & Correct Homework-Variables and Expressions-Practice
Learning Target:-I will evaluate algebraic expressions.
9/14/10 Variables and Expressions
4x for x=2
Evaluate.
Evaluate the expression for the given value of the variable.
Additional Example 2A: Evaluating Algebraic Expressions Involving Order of Operations
Course 2
2-7 Variables and Algebraic Expressions
A. 4x – 3 for x = 2
4(2) – 38 – 3
5
Substitute 2 for x.Multiply.
Subtract.
Try This: Example 2A
Insert Lesson Title Here
Course 2
2-7 Variables and Algebraic Expressions
Evaluate each expression for the given value of the variable.
A. 3x – 2 for x = 3
3(3) – 29 – 2
7
Substitute 3 for x.Multiply.Subtract.
Today’s Plan:-Entry Task & Correct Homework-Variables and Expressions-Practice
Learning Target:-I will evaluate algebraic expressions.
9/14/10 Variables and Expressions
Assignment #6
Variables and Expressions: pg 94 #1-15
Quietly get a book and start your work.