One-Step Equations 1

Addition

100

3 + a = 8

5

200

8 + a = -2

-10

300

21 + a = 6

-15

400

120 + a = 180

60

500

12 + a = -6

-18

Subtraction

100

a - 5 = 4

9

200

a - 10 = 13

23

300

 a-10 = -8

2

400

 a - 15= -15

0

500

a - 1,248 = -824

424

Grab Bag

100

What's the inverse operation of subtraction?

Addition

200

In an equation, what are you trying to do to the variable? 

Isolate the variable/ get it by itself

300

x/3=1/4

What would be the first step to solving the equation?

multiply both sides by 3

400

3=y/2.1

6.3

500

-2/6x=3

-9

Multiplication

100

5a = 25

5

200

25a = 625

25

300

8a = 120

15

400

17a = -34

-2

500

-8a = -24

3 

Division

100

a/9 =9

81

200

1/7 a=4

28

300

-a/10=4

-40

400

-7/8k=-21

24

500

2/9=-4/5m

10/36=5/18