8th Grade Math!

Positive/Negative

100

15 - 20

-5

200

-5 + 6

1

300

10 - (-30 ) 

40

400

-15 + (- 15) 

-30

500

50 - (-200)

250

Exponents

100

5² 

25

200

10²

100

300

3³

27

400

5³

125

500

10³

1,000

Positive/Negative

100

5 x (-5)

-25

200

(-4) x (-6)

24

300

6 x (-12)

-72

400

(-9) x 7

-62

500

(-8) x (-4)

32

Ratios

100

Jerry eats 5 cheetos in 1 minute.

How many can he eat in 3 minutes? 

15 Cheetos

200

Tom can run 1 mile in 10 minutes.

If he stays the same speed, how many minutes does it take him to run 3 miles? 

30 minutes

300

Albert plays violin for 20 minutes every day.

How many minutes does he play in a week? 

140 Minutes

400

Mike eats 4 hotdogs per minute in a hotdog eating contest. How many hotdogs does he eat in 9 minutes? 

36 hotdogs

500

Shawn eats 30 Takis in 2 minutes.

How many Takis does he eat in 10 minutes? 

150 Takis

Word Problems

100

George has 20 bananas. He eats 7 of them. How many are left? 

13 bananas

200

George eats 3 bananas every day. How many bananas does he eat in 10 days? 

30 bananas.

300

Samantha has 24 apples and wants to put them into bags with 4 apples each; how many bags will she need?

6 bags

400

Lisa reads 15 pages of her book each day; how many pages will she have read after 9 days?

135 pages

500

Jack pays $15 a month for Netflix. How much does it cost for 1 year of Netflix? 

$180