Evaluating ExpressionsThe Order of Operations

Lesson 1

1

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

Agenda2

Evaluate:4310

647

3520

)21(9

234

1) 2)

3) 4)

5)

34 1

5 3

13

Scaffolding

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

Agenda3

Evaluate:4310

647

3520

)21(9

234

1) 2)

3) 4)

5)

34 1

5 3

13)3(9

394

13Scaffolding

Launch- Marvin’s Trick

Agenda4

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.

5

3 7 10 15How did you make 75 with the 4 numbers?

Launch- Marvin’s Trick

Agenda

6

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

7

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?

9

Marvin challenged four students to evaluate this problem.

JuanMelinda

Shawn

Click names

Ashley

Agenda

Online

Calculator

All studentsand summary

PC Users

Next slide

Discussion

10

Marvin challenged four students to evaluate this problem.

JuanMelinda

Shawn

Click names

Ashley

Next slide

All students

Agenda

Online

Calculator

summary

2346 Ashley’s Work

101090923

PC Version- Discussion

2346 Melinda’s Work

66150144122

2346 Juan’s Work

10

900

23302

2346 Shawn’s Work

46 964236

2346 Melinda’s Work

21261446150

2346 Ashley’s Work

91090

2310

2346 Shawn’s Work

36642

946 2346

Juan’s Work

230900

2310

How can we test it?

CALCULATOR

2346 Melinda’s Work

66150144122

Marvin challenged four students to evaluate this problem.

Click names

Online

Calculator

Agenda

JuanMelinda

Shawn

Ashley

All studentsand summary

Discussion

Marvin challenged four students to evaluate this problem.

Click names

Online

Calculator

2346 Juan’s Work

10

900

23302

Agenda

JuanMelinda

Shawn

Ashley

All studentsand summary

Discussion

14

Marvin challenged four students to evaluate this problem.

Click names

Agenda

Online

Calculator

2346 Shawn’s Work

46 964236

JuanMelinda

Shawn

Ashley

All studentsand summary

Discussion

15

Marvin challenged four students to evaluate this problem.

JuanMelinda

Shawn

Click names

Ashley

Agenda

Online

Calculator

All studentsand summary

How can we test it?

CALCULATOR

2346 Melinda’s Work

21261446150

2346 Ashley’s Work

91090

2310

2346 Shawn’s Work

36642

946 2346

Juan’s Work

230900

2310

Discussion

Resources for Your Notebook

16

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)

18

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!!

19

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

Practice

Scaffolding

14

4773

48

3 41)

Agenda

21

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

Practice

)5(4

)16(20 20

2)

AgendaScaffolding

23

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

24

2423 Amy

4315 Evaluate :1) 341 2 2)

3)Who is correct?

245220

400

1623 32335

Agenda

Jamal2423

3 14

Woops!! Amy added first