8th Math Review

Solving Equations

100

7 - c = 32

-25

200

-4m = -6(8) 

12

300

6x + x = -56

-8

400

4x - 7x = 69 

-23

500

4x + 5x + 12 - 1 = -16

-3

Substituting for Inequalities

100

7x > 49 

4, 8, 10, 11 

8, 10, 11 

200

-9x ≠ 72 

-8, 0, 8, 16 

0, 8, 16 

300

k + (-12) < 0 

-12, 0, 12, 24 

-12, 0

400

13 > z ÷ 3 

-8, 20, 39, 40 

-8, 20 

500

42 > y ÷ 10 

4.2, 10, 100, 420 

4.2, 10, 100, 420 

Prime Factorization

100

33

3 · 11

200

90

2 · 3² · 5

300

175

5² · 7

400

594

2 · 3³ · 11

500

3² · 5³ · 11

12,375

Greatest Common Factor

100

12 and 68

4

200

112 and 63

7

300

36, 90, and 108 

18

400

26abc and 65ad²

13a

500

90j⁵k⁷, 105j⁷k⁵, and 55j⁶k⁶

5j⁵k⁵

Least Common Multiple

100

8 and 6

24

200

40 and 50 

200

300

42, 45, and 63

630

400

12ab and 15b²c

60ab²c

500

84r, 21s, 14t

84rst