Order of Operations Review

Order of Operations requires we...

• do calculations inside grouping symbols last

• do calculations inside grouping symbols first

So, if we perform calculations inside grouping symbols first, then we add 9 + 7 BEFORE we multiply by 2, in the expression 2(9+7), right?

• yes

• no

OK, try this. Simplify 4(10-2)

• 40

• 8

• 32

• 44

More grouping symbols practice. Simplify (2+7)10. Choose two correct answers.

• 80

• 90

• (2x10) + (7x10)

• (2x10) x (7x10)

In PEMDAS, or GEMDAS, or GEMS, after grouping symbols, we do calculations that include exponents.

• True

• False

• Sometimes

Simplify 35 - 4²

• 30

• 20

• 19

• 18

This one may be tricky 🤔 but to PEMDAS be true!

In the expression 4x2(5+5)² what do we simplify first?

• 4 X 2

• 5 + 5

• 2 x 5

Simplify 4x2(5+5)²

• 800

• 900

• 1,000

• The answer is not given

Division? Don't get freaked out by division.

REMEMBER, Grouping then Exponents THEN Multiplication OR Division, whichever is first, going from left to right.

Simplify 6 ÷ 2(1+2)

• 1

• 5

• 7

• 9

A coefficient is a number that...

• adds a variable

• subtracts a variable

• multiplies a variable

• divides a variable