8th Grade Math Unit 1 Review

Order of Operation

100

18−12÷3 

14

200

48÷(4+2)+7 

15

300

5+3[12−2(4)] 

17

400

-12 + 2(-4 + 3² x 2)

16

500

2² - 20÷4 x2 +[4-(-5+3)]

0

Combining Like Terms

100

−7x−2x

-9x

200

4x+3+2x

6x+3

300

6x+4−2x+7

4x+11

400

5x+3−2x+7+4x−6

7x+4

500

12x+5−7x+3−2x−8

3x

Distributive Property

100

5(x−2)

5x-10

200

−2(4x−3)

-8x+6

300

6(3x+2)−7

18x+5

400

3(2x−5) - 4(x+2)

2x-23

500

−5(2x−4)+2(3x+7)

-4x+34

Solving for x

100

x−9=4

13

200

3x−7=20

9

300

3(x+4)=24

4

400

4x+7=2x+19

6

500

2(x+5)−3=4x+1

3

Evaluating Expressions

100

2x+3, when x= -6

-9

200

x−4, when x= -12

-16

300

2x²+3, when x=4

35

400

2x²+5(x−3), when x= -4

-3

500

2x²−4(x+2), when x=5

22