Chapter 2 Variables & Expressions

Solve for the variable

100

Solve for the variable. 

x - 21 = 35

x = 56

200

Solve for the variable.

m + 12 = 87

m = 75

300

Solve for the variable.

10n = 120

n = 12

400

Solve for the variable.

5x + 8 = 33

x = 5

500

Solve for the variable. 

3m + 67.89 = 123.3

m = 18.47

Exponents

100

Which number is the exponent & which number is the base? 

6²

2 is the exponent. 6 is the base.

200

Write using an exponent. DO NOT SOLVE.

8 x 8 x 8 x 8 x 8

8⁵

300

4³

64

400

4² + 5²

41

500

9⁴

6561

Evaluate Expressions

100

Solve the expression for x = 3

20 + x

23

200

if x=5 & y=1.2

x + y

6.2

300

If x=5

100 + x²

125

400

If x=5 & y = 8,

2(x+5) + 8

28

500

if x=5 & y= 3,

7y + 2x³ 

271

PEMDAS

100

8 - 3 x 2

2

200

2(2x5-3)

14

300

(2 + 8²) - 31

35

400

24 ÷ 6 x 2

8

500

(10-4+3)² ÷ 3

27

Properties

100

What property is this?

5 x 4 = 4 x 5

Commutative

200

What property is this?

10 x 1 = 10

identity

300

Which property is this & what is the missing value?

(3 + 5) + 6 = ___ + (5 + 6)

associative, 3

400

Simplify. 

10(c + 3)

10c + 30

500

Simplify.

5(m - 7)

5m - 35