Writing Expressions
Writing Equations
Operations and Inverse Operations
Solving One-Step Equations
Solving Two-Step Equations
100

Use n for the unknown number.

Write an expression that represents:

"three more than a number"

n+3

100

Use n for the unknown number.

Write an equation to represent:

"4 more than a number is 13"

n + 4 = 13

100

What is "happening to" the variable in the following equation?

m + 8 = 12

 + 8

(8 is being added to it)

100

Solve for m:

m-3=11

14

100

Solve:


5x+1=11

x=2

200

Use n for the unknown number.

Write an expression that represents:

"five less than a number"

n - 5

200

Use n for the unknown number.

Write an equation to represent:

"six less than a number is 10"

n - 6 = 10

200

What is the operation "happening to" n in the following equation?

n - 6 = 8

- 6

(6 is being subtracted from it)

200

Solve the equation:

n-7=13


n=20

200

Solve:


4n+3=23

n=5

300

Use n for the unknown number.

Write an expression that represents:

"triple a number"

3n

300

Use n for the unknown number.

Write an equation to represent:

"one third of a number is 22"

n/3 =22

300

What is the operation that is "happening to" w in the equation?

8w = 16

x8

(it is being multiplied by 8)

300

Solve:

4y=12

y=3

300

Solve:


m/2 +2=5

m=6

400

Use n for the unknown number.

Write an expression to represent:

"four more than double a number"

2n + 4      or      4 + 2n

400

Use n for the unknown number.

Write an equation to represent:

"five less than double a number is 12"

2n - 5 = 12

400

What is the inverse of the operation "happening to" the variable in the equation? 

x/7 =5

x 7

400

Solve:


e/3 =12

e = 36

400

Solve:


-m-1=-6

m=5

500

Use n for the unknown number.

Write an expression that represents:

"five less than half a number"

n/2 -5

500

Use n for the unknown number.

Write an equation to represent:

"double a number is 5 more than the number itself"

2n = n + 5

500
What is the inverse of the operation that is applied to m in the equation?


2m = 18

divide 2

500

Solve:

-2m=6


m=-3

500

Solve:


5x=3x+8

x=4