Topic 6: Variables and Expressions

A variable is a letter or symbol that stands for something that can...

• stay the same

• always be equal

• change

n + 7 =

• 7 less than a number

• 7 more than a number

• 7 times a number

• a number divided by 7

7n

• 7 less than a number

• 7 more than a number

• 7 times a number

• 7 divided by a number

n/7

• 7 less than a number

• 7 more than a number

• 7 times a number

• a number divided by 7

20/n

• 20 less than a number

• a number divided by 20

• 20 divided by a number

• 20 times a number

n(7)

• 7 less than a number

• 7 more than a number

• 7 times a number

• a number divided by 7

Solve for 11n if n = 3

• 14

• 8

• 33

• 3.4

Solve n - 3 if n = 9

• 12

• 6

• 27

• 3

Solve 5.2 + n if n = 10

• 6.2

• 5.12

• 15.2

• 4.8

Solve 3p + 22 if p = 5

• 30

• 24

• 32

• 37