Senior Math Review

% of a number

100

What is 25% of 48?

12

200

What is 15% of 20?

3

300

Sarah spent $56 at the restaurant. If she wants to leave a 20%, how much money should she leave as a tip?

$11.20

400

What is 84% of 150?

126

500

Tyler went Black Friday shopping. The entire store was 65% off every item. If the original price of the TV was $950. What did he pay for the TV?

Tyler paid $332.50

65% off is $617.50

Decimal +, -

100

52.48 + 15.02

67.5

200

486.231 + 10.105

496.336

300

799.84 - 700.51

99.33

400

105.2 + 72.0456

177.2456

500

456.789 - 123.456

333.333

Decimal X, /

100

2.3 X 5

11.5

200

7.48 X 0.3

2.244

300

65.1 ÷ 7 

9.3

400

15 ÷ 2.4

Remember to move the decimal!

6.25

500

1899 ÷ 45

42.2

Multi-step Equations

100

-12x + 3 = 6x -15

x = 1

200

5x + 8 +3x + 4 = 40 + 4

x = 4

300

3(x - 2) = 5x + 20

x = -13

400

2(x + 3) = 3(3 - x)

x = 3/5

500

7(x + 2) = x(3 - 6)

x = -14/10

2-Step Equations

100

2x + 5 = 21

x = 8

200

3x - 4 = 11

x = 5

300

-18x + 30 = -150

x = 10

400

x/4 -3 = 2

x = 20

500

8x + 5 = 29

x = 3