Single Variable Addition
Single Variable Subtraction
Multi Step Addition
Multi Step Subtraction
Vocabulary
100

5 + 3 = x

x = 8
100

7 - 2 = x

x = 5

100

X + 7 = 9

X = 2
100

x - 3 = 6

x = 9
100

Write the problem in words

5 + x = 12

"Five plus x equals twelve"

200

12 + 5 = x

X = 17

200

10 - 9 = x

x = 1
200

X + 8 = 14

X = 6
200

x - 6 = 12

x = 18

200

What is a Variable?

any letter that is placed within an algebraic equation... an unknown value

300

3 + 19 = x

x = 22
300

16 - 7 =

x = 9

300

x + 10 = 25

X = 15

300

x - 10 = 27

x = 37

300

What is the variable in the follow problem? 

5 + x = 12

'x'

400

21 + 35 = x

x = 56
400

23 - 13 = x

x = 10

400

23 + x = 40

X = 17

400

x - 17 = 23

x = 40

400

What is the Inverse Operation (or opposite) for addition (+)?

Subtraction (-)
500
27 + 16 = x
x = 43
500

34 - 6 = x

x = 28

500
7 + x + 4 = 12
X = 1
500

x - 14 = 21

x = 35

500

What is the Inverse Operation (opposite) for multiplication (x)?

Division (รท)

600

22 + x = 32

x = 10

600

12 - x = 4

x = 8

600

3x + 7 = 22

x = 5

600
2y - 5 = 9

y = 7

600

Bonus!

12 + x - 5 = 20

x =

x = 13