Grade 7 Math Review

Algebraic Expressions

100

Five less than a number

n - 5

200

A number increased by 10

n + 10

300

Triple a number

3n

400

Six more than three times a number

3n + 6

500

Four less than three times the number of red counters is 20

3n - 4 = 20

Add and Subtracting Integers

100

(+9) + (-1)

(+8)

200

(-4) - (+11)

(-15)

300

(-8) + (-3)

(-11)

400

(+13) - (-6)

(+7)

500

(-1) - (-5)

(+4)

Adding and Subtracting Fractions

100

7/5 + 3/5

10/5

and for a bonus point reduce it to it's lowest form

200

13/10 - 2/3

19/30

300

11/12 - 8/12

3/12

For a bonus point, reduce it to it's lowest form

400

2 1/6 + 4 7/8

7 1/24

500

3 1/10 - 1 4/5

13/10

Bonus point if you convert this into a mixed number

Solving Equations

100

n + 12 = 24

n = 12

200

n + 7 = -3

n = -10

300

n - 18 = -15

n = 3

400

4n = 28

n = 7

500

5n + 8 = 73

n = 13

Circles

100

Calculate the diameter o the circle. Use 3.14 for pi

C = 37.68cm

d = 12cm

200

Find the area of the circle with a radius of 8m. Use 3.14 for pi

a = 200.96m²

300

Karla and Jeremy have a circular pool with a diameter of 12 feet. What is the circumference of the pool?

c = 37.68ft

400

Find the area of a circle with a diameter of 8ft.

a = 50.25ft²

500

Find the area of a circle with the radius for 7in.

A = 153.86in²