• Mastery PD Materials

## Multiplication with three factors and volume

Spine 2: Multiplication and Division – Topic 2.20

### Introduction

Use multiplication to calculate the volume of cuboids and shapes comprised of several cuboids; use division to solve associated inverse problems. Use associativity and commutativity to solve abstract multiplication problems with three factors.

### Teaching points

• Teaching point 1: Volume is the amount of space that something occupies.

• Teaching point 2: Volume is measured in cubic units, such as cubic centimetres (cm3) and cubic metres (m3).

• Teaching point 3: The volume of a cuboid can be calculated by multiplying the length, width and height.

• Teaching point 4: Both the commutative law and the associative law can be applied when multiplying three or more numbers.

• Teaching point 5: The choice of which order to multiply in can be made according to the simplest calculation.

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