Chapter 7 Review

Addition Equations

100

18 + g = 38

20

200

y + 2.1 = 13

10.9

300

y + 1/2 = 3/4

1/4

400

m + 2.3 = 18

15.7

500

c + 1/2 = 7/10

1/5

Subtraction Equations

100

a - 152 = 90

242

200

k - 4.4 = 1302

1306.4

300

p - 16 = 24

40

400

r - 119 = 70

189

500

b - 5.4 = 14.2

19.6

Multiplication Equations

100

2/5 x f = 18

45

200

2s = 34

17

300

4.8d = 2.4

0.5

400

2/3h = 16

24

500

3s = 15

5

Division Equations

100

d/75 = 25

1875

200

x/0.3 = 27

8.1

300

b/14 = 21

294

400

e/120 = 30

3600

500

c/0.6 = 24

14.4

Word Problems

100

For every quarter spent, Sarah receives 50 food pebbles to feed the fish. Sarah has thrown 350 food pebbles into the fish pools. Write and solve a multiplication equation to find the number of quarters Sarah spent on fish food.

50q = 350

7 quarters

200

An exterminator charges $80 to visit a home, and $35 to spray each room. If the total bill was $395, how many rooms were sprayed?

9

300

Marco's model bridge is 9 centimeters taller than Carly's model bridge. If Carly's model bridge is 31 centimeters tall, write a subtraction equation to find the height of Marco's bridge. 

c - 9 = 31

400

One fifth of the plants in a vegetable garden are tomato plants. If there are 8 tomato plants, write a division equation that can be used to find the total number of plants in the garden.

p/5 = 8

500

Mary is 132 centimeters tall. This is twice the height of her younger sister. How tall is her younger sister?

66 cm