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Multiplication and Division: Mental Strategies

KS3 Numeracy Year 8
This unit is part of Around ARE Consolidating Numeracy

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Objectives

Day 1

  • Understand division as the reverse of multiplication: factors.

KS3 Objective

  • Use the concepts and vocabulary of factors (or divisors).

Day 2

  • Use efficient mental doubling and halving strategies.

KS3 Objective

  • Use relationships between operations.

Day 3

  • Carry out division for numbers greater than tables facts.

KS3 Objective

  • Use the four operations, including formal written methods applied to integers.

Lesson Planning

Day 1

Check-up

Write related multiplication and division facts. Find factors of 2-digit numbers.

Follow-up

Multiplication and division facts for the 6 times table, using arrays to see how they link. Use factor bugs to find factors of 2-digit numbers.

Day 2

Check-up

Use doubling and halving to multiply and divide whole numbers and amounts of money by 4, 5 and 8.

Follow-up

Use images such as towers of cubes and dividing cakes to show how doubling and halving can be used to multiply and divide by 4, 5 and 8.

Day 3

Check-up

Divide numbers above the times tables (no remainders), including word problems.

Follow-up

Use a context and the number line to support dividing numbers above the times tables (no remainders).

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