1-Step Equations, Positive Numbers

adding 1-step equations

100

The inverse operation of addition? 

What is subtraction?

200

8 + b = 12

b = 4

300

c + 11 = 14

c = 3

400

5 + d = 7

d = 2

500

e + 7 = 18 

e = 11

600

17 + f = 23

f = 6

700

g + 21 = 30

g = 9

subtracting 1-step equations

100

The inverse operation of subtraction.

What is addition? 

200

8 - b = 3

b = 5

300

c - 13 = 11

c = 24

400

32 - d = 13

d = 19

500

e - 32= 9

e = 41

600

f + 25 = 31

f = 6

700

g - 14 = 24

g = 38

multiplying 1-step equations

100

The inverse operation of multiplication. 

What is division? 

200

24 = 4b

b = 6

300

6c = 36

c = 6

400

45 = 5d

d = 9

500

8e = 48

e = 6

600

91 = 9f

f = 9

700

8g = 72

g = 9

dividing 1-step equations

100

The inverse operation of division.  

What is multiplication? 

200

36 / b = 4

b = 9

300

c / 6 = 8

c = 48

400

60 / d = 10 

d = 6

500

e / 9 = 6

e = 54

600

72 / f = 8

f = 9

700

g / 9 = 9

g = 81

1-step equations with Rational Numbers

100

X - 4.34= 12.85

x=17.19 

200

 t- 1.2 = 5.8 

t= 7.0

300

 5x = 25 

x= 5

400

The equation x + 2.50=7.50 re-written using the inverse operation. 

7.50 - 2.50=x

500

x - 1.5 = 8.5

y=10.0

600

y - 1.3 = 7.3

y= 8.6

700

y/7 = 20

y = 140