Dividing with a Remainder

Maths: KS3, topic 1.2.5

Dividing with a Remainder

Learn how to divide whole numbers when there is an amount left over.

What is a remainder?

What is a remainder?

  • Sometimes a number cannot be divided exactly into equal groups

  • The amount left over is called the remainder

  • For example, 14 ÷ 4 gives 3 full groups with 2 left over

  • So, 14 ÷ 4 = 3 r 2

Use multiplication to check

Use multiplication to check

  • To work out 17 ÷ 5, use the 5 times table

  • 5 × 3 = 15, which is too low

  • 5 × 4 = 20, which is too high

  • So the answer is 3 r 2

The remainder must be smaller

The remainder must be smaller

  • The remainder must always be smaller than the number you are dividing by

    • For example, in 23 ÷ 6, the remainder cannot be 6 or more

    • 6 × 3 = 18, and 23 − 18 = 5

  • So, 23 ÷ 6 = 3 r 5

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