One-Step Equations with Addition and Subtraction

Addition

100

x + 6 = 19

x = 13

200

n + 20 = 43

n = 23

300

g + 46 = 70

g = 24

400

134 = p + 90

p = 44

500

256 = 129 + w

w = 127

Subtraction

100

x - 12 = 30

x = 42

200

n - 30 = 10

n = 40

300

h - 27 = 54

h = 81

400

g - 78 = 110

g = 188

500

0 = t - 113

t = 113

Mixed

100

y + 42 = 67

y = 25

200

x - 17 = 17

x = 34

300

67 = b - 116

b = 183

400

f + 68 = 102

f = 34

500

97 = j - 59

j = 156

Vocabulary

100

Operations that undo each other are called this

Inverse operations

200

The inverse operation of addition

Subtraction

300

The inverse operation of subtraction

Addition

400

The word we use to describe the variable being by itself on one side of the equal sign

isolated

500

The math term for the answer to an equation

the solution

Challenge!

100

h - 21 = -52

h = -31

200

m - 5 = -10

m = -5

300

h - 14 = -31

h = -17

400

p - 13 = -10

p = -23

500

-45 + x = -90

x = -45