GEMDAS (Order of Operations)

Word Stuff

100

Give the correct order of operations.

Grouping Symbols, Exponents, Multiplication OR Division, Addition OR Subtraction

200

Why is it important to know GEMDAS as a mathematician?

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

300

What is the phrase used to remember PEMDAS?

Please excuse my dear Aunt Sally. 

400

Tell what 5 ³ really means. (Expanded form)

It means 5 x 5 x 5

500

The problem was 20 - 5 x 2 + 3. My answer was 33. What did I do wrong?

I went from left to right without using the correct order of operations.

Fix my Mistake

100

9 - 3 x 2=12

Correct answer is 3. Multiply then subtract, not subtraction then multiplication.

200

5 ² + 1=11

5 ² = 25, not 10. Correct Answer is 26.

300

3² - 6 = 0

3 ² = 9, not 6. Correct answer is 3

400

4 + 5 + 7 - 3 x 2 = 26

You need to follow GEMDAS and multiply first. Correct answer is 10.

500

10 ³ = 30

10 ³ = 10 x 10 x10, which is 1000, not 30.

Solve

100

3 + 4 x 5

23

200

7 + (2 x 4) - 1

14

300

56 ÷ (4+4) + 3²

16

400

20 – (5+3) x 2 + 4

8

500

(5 x 4) – 6 ÷ 2 + 9

26

Prime Factors

100

68

2 × 2 × 17

200

150

2 x 3 x 5 x 5

300

88

2, 2, 2, and 11

400

104

 2 × 2 × 2 × 13

500

360

2 x 2 x 2 x 3 x 3 x 5

Review

100

There is a ratio of 2 boys to 1 girl. If there are 5 girls, how many boys are there?

10

200

How do we multiply fractions?

Straight across

300

What is one of the strategies that we used to divide fractions?

Keep change flip, or get common denominator

400

True of False: When adding/subtracting fractions, you add the numerator AND the denominators

FALSE

500

When converting a decimal to a percent, you shift the decimal two places to the LEFT. 

False! To the right