7th Grade Math Review

Integers

100

742-375=?

367

200

200-348=?

-148

300

-83-59=?

-142

400

-49+102=?

53

500

−10(1+ 4) − 5

-55

Percents

100

5% of 160 what number?

8

200

Amanda got a 21/28 on her test. What is her percent score?

75%

300

What is 25% of 60?

15

400

A restaurant bill comes to $34.60. You decide to leave an 15% tip. What is the total cost of the bill?

$39.79

500

Kim bought a hat in California. The hat cost $15 before the 8% sales tax was applied. How much did Kim pay for the hat after taxes were added?

Kim paid $16.20

Ratios

100

Skyzone sells tickets for their jump area. You buy a ticket for 4 hours and it costs $24. How much are you paying per hour to jump?

$6

200

What is the simplest form of the ratio 6:42 (6/42)?

1:7 or 1/7

300

Blake is able to get 27 miles on 1 tank of gas. How many miles can Blake travel on 6 tanks of gas?

162 miles

400

A toy company can produce 9 toys in 3 hours. How many toys can they produce in 24 hours?

72 toys

500

You paid $28.00 for 8 gallons of gasoline. How much would you pay for 15 gallons of gasoline?

You would pay $52.50

Equations

100

Solve for n. 2n=46

n=23

200

Solve for n. 

n - 25 = 83

n=105

300

Solve for n. 5n+35=60

n=5

400

Solve for n. (n/3)=4

n=12

500

3h − 3 = 15 

h=6

Probability

100

You have 5 green marbles and 10 blue marbles.  What is the P(green)?

1/3 or 33%

200

What is P(even) when rolling a six sided die?

3/6 or 1/2 or 50%

300

What is the P(heads) twice in a row when flipping a coin?

1/2 X 1/2 = 1/4 or 25%

400

You have a bag with 4 blue marbles, 5 red marbles, 3 green marbles, and 2 white marbles.  What is P(white,white) if you replace the marbles each time you pull them?

2/14 X 2/14 OR 1/7 X 1/7 = 1/49 OR about 2%

500

You have a bag with 4 blue marbles, 5 red marbles, 3 green marbles, and 2 white marbles.  What is P(blue,blue) if you DO NOT replace the marbles each time you pull them?

4/12 X 3/11  OR 1/3 X 3/11= 1/11 or about 9%