Year 8

# Counting cubes (Part 2)

## Slide deck

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## Lesson details

### Key learning points

- In this lesson, we will learn what volume is, and you will use informal counting strategies to find the volume of different solid shapes.

### Licence

This content is made available by Oak National Academy Limited and its partners and licensed under Oak’s terms & conditions (Collection 1), except where otherwise stated.

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### 6 Questions

Q1.

How many cubes were used to create this solid shape?

10

7

8

Q2.

How many cubes were used to create this solid shape?

10

7

9

Q3.

This solid shape is formed from two copies of the previous question. How many cubes have been used to create this solid shape?

11

14

18

Q4.

How many cubes were used to create this solid shape?

12

5

8

9

Q5.

How many cubes were used to create this solid cuboid?

12

20

8

Q6.

How many cubes were used to create this cuboid?

24

48

57

96

### 5 Questions

Q1.

Which is the best mathematical definition for volume?

A measure of the front layer multiplied by the number of layers

Multiplying each side together

The space inside

Things measured in cubic centimetres cubed.

Q2.

This shape was made using 1 centimetre unit cubes. What is the volume of this shape?

6 cubic centimetres

7 cubic centimetres

9 cubic centimetres

Q3.

The volume of one cube is 1 cubic metre. What is the volume of this cuboid?

18 cubic centimetres

18 cubic metres

27 cubic centimetres

9 cubic metres

Q4.

Can you use 16 unit cubes to make a larger cube?

Yes you can make a larger cube with 16 unit cubes.

Q5.

This cuboid was made out of cubes of 1 cubic centimetre. The cuboid has been partly painted. What could the volume of the cuboid be?

26 cubic centimetres

35 cubic centimetres

4 cubic centimetres