One-Step Equations Review

Addition Equations

100

a+3=8

a=5

200

x + 8 = 12

x = 4

300

a + \frac[1]4 = 8

a = 7\frac[3]4

400

a + 34.7 = 120

a = 85.3

500

x + \frac[3]8 = 5\frac[3]4

x = 5\frac(3)8

Subtraction Equations

100

a-5=4

a=9

200

5=j-34

j=39

300

6.6=w-1.2

w = 7.8

400

y-1.2=4.8

y=6

500

b - \frac[3]15 = 1

b = 1\frac[3]15 or 1\frac[1]5

Random Equation Facts

100

Give me an example of a variable

any letter

200

Define inverse operation

opposite operations 

or

operations that undo each other

300

What is the inverse operation of addition? 

Subtraction

400

Name the 4 operations

addition, subtraction, multiplication, division

500

What can you do to check your answer when solving?

Plug your answer into the original equation

Multiplication Equations

100

5a = 25

a=5

200

15n = 645

n = 43

300

12s = 120

s = 10

400

72 = 0.6r

r = 120

500

\frac[5]6k = \frac[1]6

k= \frac[1]5

Division Equations

100

\frac[a]9 = 9

a = 81

200

5 = \frac[m]7

m = 35

300

4.7 = \frac[y]3

y = 14.1

400

\frac[d]9.2 = 5.3

d = 48.76

500

1.4 = \frac[c]1.4

c = 1.96