5.3.4

Multiplication & Division

Test yourself

Multiplication & Division in your Head

Use the knowledge you have already to multiply and divide in your head.

Illustrative background for 21 × 8Illustrative background for 21 × 8 ?? "content

21 × 8

  • 21 × 8 can be broken down into two easier calculations by partitioning 21.
    • 20 × 8 = 160
    • 1 × 8 = 8
  • Finally, add the two answers.
    • 21 × 8 = 160 + 8 = 168
Illustrative background for Division using times tablesIllustrative background for Division using times tables ?? "content

Division using times tables

  • 144 ÷ 12 = 12
    • You can work this out using your 12 times table.
  • 360 ÷ 4 = 90
    • You know that 36 ÷ 4 = 9 from you 4 times table.
    • So 360 ÷ 4 = 9 × 10 = 90

Jump to other topics

1Year 5 - Number

2Year 5 - Measurement

3Year 5 - Geometry

4Year 5 - Statistics

5Year 6 - Number

6Year 6 - Ratio & Proportion

7Year 6 - Algebra

8Year 6 - Measurement

9Year 6 - Statistics

9.1Displaying Data

9.2Averages

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