Unit 1 Review - Math 8

Expressions

100

What does an expression NOT have?

Equal sign (=)

200

Which of these is an expression?

a) 3x + 4 = 10

b) 7x + 2y

c) 3a + 2b = 4c

b) 7x + 2y

300

Write an expression:

4 more than a number

4 + x

or

x + 4

400

Write an expression:

The product of 5 and a number

5x

500

Write an expression:

The quotient of 3 times a number and 7

(3x)/7

Order of Operations

100

What does E stand for in PEMDAS?

Exponents

200

Simplify:

3^2-4*2

1

300

Evaluate the expression for a = 3

(a-5)+2a

4

400

Evaluate the expression for x = 5

(3x+1)/(x^2-21)

4

500

Evaluate the expression for m = -3

|m-11|+3m*2m-8

60

Integers

100

|-17|=

17

200

Write these numbers in order from least to greatest:

-12, -14, 0, 9, -5, 4, -2, 7

-14, -12, -5, -2, 0, 4, 7, 9

300

40 - ( -14) = 

54

400

-15*23=

-345

500

(-133)/(-7)=

19

Properties

100

What is the additive identity?

0

200

Which property is this?

3 + 5 = 5 + 3

Commutative

300

Which property is this?

(4+6+x)*0=0

Property of zero

400

What is the multiplicative inverse of 

5/7

7/5

500

Fill in the blank to make this show the distributive property:

5(3x + 8) = __________

5*3x+5*8

or

15x + 40

Solving Equations

100

x + 5 = 9

x = 4

200

6 = y - 11

y = 17

300

3x = -36

x = -12

400

j/8=-17

j = -136

500

-9x=-126

x = 14