Expression & Equations Review/Practice (Unit 6)

1-Step Equations

100

x + 9.45 = 4.20

x = -5.25

200

-11.68 + y = 27.99

y = 39.67

300

-6.5z = -18.32

z = 2.82

400

m/-10.17 = 301.95

m = -3,070.83

500

-6x = -12

x = 2

2-Step Equations

100

10x + 17 = 125

x = 10.8

200

-4y - 16 = 14

y = -7.5

300

t/6 + 7 = 32

t = 150

400

-x + 9 = 16

x = -7

500

m/-8 - 13 = 33

m = -368

Vocabulary

100

The number that stands by itself. 

Constant

200

Each part of the expression separated by + or -

terms

300

A letter that represent an unknown value 

variable

400

The number attached to the variable 

coefficient 

500

A number sentence without an equal sign 

expression

Distributive Property

100

7(x + 3)

7x + 21

200

-6(y - 2)

-6y + 12

300

7(3x + 8)

21x + 56

400

-5(12z + 7x)

-60z - 35x

500

-4(3x - 9z)

-12x + 36z

Multi-Step Equations

100

9(x + 8) = 98

x = 2.89 or x = 26/9

200

7(y + 4) = 35

y = 1

300

-2(-z + 5) = 76

z = 43

400

-5(3t - 1) = 64

t = -3.933333

500

6(4y + 12) = 104

y = 1.3333

7th Grade Math

100

What is the top number of a fraction called?

ex: ____ / 4 

ex: ____ / 10

ex: ____ / 5

Numerator

200

What does it mean to be a prime number?

ex: Why is 2 a prime number? Why is 7 a prime number? Why is 13 a prime number?

There are exactly two factors that multiply to make that number

300

How do I write 52 hundredths as a fraction? 

52 / 100

400

What is the fraction for 0.36 ?

36 / 100

500

What is 1 / 2  + 4 / 3 ? 

11 / 6 or 1 5/6