Math 7: Unit 2

Expressions

100

Simplify:

3x + 5x - 2

8x - 2

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)

MORE Expressions

100

Distribute:

4(x+5)

4x + 20

200

Factor:

8y - 12

4(2y - 3)

300

Evaluate if x = -2

8x + 5

-11

400

Simplify:

-2(3y - 6) -5(y + 5)

-11y - 13

500

Simplify, then FACTOR:

-(2y - 6) + 2

2(-y + 4)

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

Translating Expressions

100

The sum of a number and negative 2

n + (-2)

or

n - 2

200

Twelve less than a number

n - 12

300

18 subtracted from triple a number

3n - 18

400

The sum of five and the quotient of a number and negative three

5 + n/-3

500

seventeen people over the maximum capacity, divided by two

(17 + m)/2