5th Grade PEMDAS (Order of Operations)

Word

100

Give the correct order of operations.

Parentheses, Exponents, Multiplication OR Division, Addition OR Subtraction

200

Why is it important to know PEMDAS as a mathematician?

So everyone can solve every problem the same (correct) way.

300

What is the saying we use to remember the correct Order of Operations?

Please Excuse My Dear Aunt Sally.

400

The problem (20-2+5) + 6 x (2 x 4). What do I do first?

(20-2) = 18 FIRST

500

The problem 20 - 5 x 2 + 3. What do I do first and second?

(5x2) = 10 FIRST

(20-5) = 15 SECOND

Solve #1

100

3 + 4 × 5 + 6

29

200

20 − 4 × 2 − 5

7

300

6 × 5 + 6 + 4

40

400

4 + 5 + 7 - 3 x 2 = 26

Is this student correct?

No, if you follow PEMDAS, correct answer is 10.

500

22 + 6 × (3 − 1)

34

Solve #2

100

3 + 4 x 5

23

200

7 + (2 x 4) - 1

14

300

12 + 9 − (2 × 8)

5

400

20 – (5+3) x 2 + 4

8

500

(5 x 4) – 6 ÷ 2 + 9

26

Solve #3

100

14 - 2 x 7

0

200

6 × (4 × 4 − 10)

36

300

5 + 14 ÷ 2 × 5

40

400

10 + 3 − (4 − 3)

12

500

(5 × 4) − (6 + 6)

8

Other Math

100

135 x 4

540

200

127 x 3

381

300

65 x 10

650

400

17 x 15

255

500

156 x 9

1,404