Algebra Review Year 8

Six times an unknown number

• 6b

• b6

• b x 6

• b x b x b x b x b

A number is multiplied by five, then four is subtracted to give an answer of sixteen.

• s - 4 x 5 = 16

• 5s - 4 = 16

• 16 = s - 4 x 5

• s x 5 - 4 = 16

Eleven plus an unknown number equals zero

• k = 0 + 11

• 11k = 0

• 11 + k = 0

• k + 0 = 11

What is the constant in this expression? 8j + 9

• 8j

• +

• j

• 9

What is the variable in this equation? 8j + 9

• +

• 8j

• 9

• j

What is the term in this equation? 8j + 9

• +

• 9

• 8j

• j

Find the unknown of this equation. 8 + i = 16

• i = 16

• i = 8

• i don't know

• i = 6

Find the unkown: 7y = 21

• y not let it remain unknown?

• y = 3

• y = 28

• y = 7

Is this an expression or equation? o + 17 = 22

• Expression

• Equation

Create an expression for the following scenario: The prize box starts with an unknown amount of chocolate, half are given away and then 8 more are taken.

• Let c = chocolates

  2 ÷ c - 8

• Let c = carrots

  c ÷ - 8

• Let c = chocolates

  c ÷ 2 - 8

• Let c = chocolates

  - 8 + c + 2