21 st century lessons evaluating expressions the order of operations 1

Warm Up/Do NowOBJECTIVE: SWBAT indentify and begin to follow the order of operations when evaluating expressions.

Agenda

2

Evaluate:4310

647

3520

)21(9

234

1) 2)

3) 4)

5)

34 1

5 3

13

Scaffolding

Agenda:

1) Warm Up 2) Launch

3) Explore

4) Practice

5) Assessment/Exit Slip

4

Marvin’s Trick- Independent

Agenda

The Four Students Problem- Partners

Whole class

Partners

Independent

OBJECTIVE: SWBAT indentify and begin to follow the order of operations when evaluating expressions.LANGUAGE OBJECTIVE: SWBAT to discuss and interpret why the order of operations are important and identify the words expression and evaluate.

Independent

Discussion-Lesson-

Notes- Recourses for Your Notebook- Independent

Launch- Marvin’s Trick

Agenda

5

has a challenge for you!Marvin the “Amazing Math Magician”

Hey class, bet you can’t make 75 with the numbers:

3 7 10 15

But, you must use all 4 numbers only once.

You can use any operation you like addition, subtraction, multiplication or division, more than once, and in any order you choose.

6

3 7 10 15

How did you make 75 with the 4 numbers?

Launch- Marvin’s Trick

Agenda

7

A way to make

3 7 10 15

75

107 31575

70 5

using

Expression??????This is a way to write the work you did as one math expression.

Numbers and symbols grouped together that show the value of something.

Launch- Marvin’s Trick

Agenda

Explore- The Four Students Problem

8

Agenda

Marvin challenged four students to evaluate this problem 2346

Your task with your partner is to determine how the students obtained their answer.

900346 2 Juan150346 2 Melinda

42346 2 Shawn

Student’s results90346 2 Ashley

Support your response with evidence, by listing the operations in the order in which the student did them.Your group is responsible for 2 or 4 students.

Evaluate?

10

Marvin challenged four students to evaluate this problem.

JuanMelinda

Shawn

Click names

Ashley

Agenda

Online

Calculator

All studentsand summary

PC Users

Next slide

Discussion

Resources for Your Notebook

17

Agenda

The Order of Operations

42

1)

Think back to the warm up. Is there a problem that contained any symbol Shawn didn’t use?

1) Parentheses or Grouping Symbols

Click to open warm up.

2346 Shawn’s Work

2) Exponents

946 9

3) Multiplication/Division

36636

4) Addition/Subtraction(Left to Right)

(Left to Right)

19

Practice- Partners

1) 2) 20 ÷ (6 – 1)

3) 10 + 23 – 5 4) 9 + 3 + 9 ÷ 3

5) 6 + 10 ÷ 2 – 1 6) 2 + 5 x 6 ÷ 2

Directions: Using the Order of Operations, evaluate the following expressions.

Agenda

4773

Let’s do number 1 and 2 together!!

20

Directions: Using the Order of Operations, evaluate the following expressions.

Practice

Scaffolding

1

4

4773

48

3 41)

Agenda

22

Directions: Using the Order of Operations, evaluate the following expressions.

Practice

)5(

4

)16(20 20

2)

AgendaScaffolding

24

Practice

1) 2) 20 ÷ (6 – 1)

3) 10 + 23 – 5 4) 9 + 3 + 9 ÷ 3

5) 6 + 10 ÷ 2 – 1 6) 2 + 5 x 6 ÷ 2

Directions: Using the Order of Operations, evaluate the following expressions.

8 4

13 15

10 17

Agenda

4773

Assessment/Exit Slip

25

2423 Amy

4315 Evaluate :1) 341 2 2)

3)Who is correct?

245220

400

1623 32335

Agenda

Jamal2423

3 14

Woops!! Amy added first