Math 7: Unit 2

Expressions

100

18 subtracted from triple a number

3n - 18

200

Simplify:

36 ÷ 6(2³) - (5 - 10)²

23

300

Evaluate if x = -2 and y = 4

(x² + xy) / (x + 3y)

hint: write as fraction better visualize

-4/10 or -2/5

400

Simplify:

4(x + 10) - (2x - 5)

2x + 45

500

Simplify, then FACTOR:

12x + 3y - 3x + 3y

3(3x + 2y)

Monomials

100

Simplify:

(-2)⁷ ÷ (-2)⁴

(-2)³

200

Simplify:

(a³b⁴)(a⁹b⁴)

a¹²b⁸

300

Simplify:

8x¹⁰ - 10x³ * 4x⁷

-32x¹⁰

400

Simplify:

(2z⁵ * 4z³)²

64z¹⁶

500

Simplify:

((3x²y * 4xy³)²) ÷ (6xy²)

hint: write as fraction to better visualize

24x⁵y⁶

Properties

100

Name the property:

(3x)(8) = (8)(3x)

Commutative Prop.

200

Name the property:

(1/4)(12x - 8) + 9 = 3x - 2 + 9

Distributive Prop.

300

Fill in the blank to make the statement true for the INVERSE prop.

(-8x + 10) + (________) = 0

8x - 10

400

What is the additive INVERSE of 1/3?

-1/3

500

What is the multiplicative IDENTITY of -1/2?

1