Year 3

Year 3

# Calculating the perimeters of shapes in m and cm

## Lesson details

### Key learning points

1. In this lesson, we will look at regular and irregular 2D shapes and calculate their perimeters in mixed units

### 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.

## Video

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## Worksheet

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## Starter quiz

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### 5 Questions

Q1.
Which number sentence is correct?
5cm and 2 mm > 5cm and 3 mm > 5 cm and 9 mm
Correct answer: 5cm and 3 mm > 5cm and 2 mm > 5 cm and 1 mm
5cm and 3 mm > 5cm and 2 mm > 5 cm and 9 mm
Q2.
Which number sentence is correct?
9cm and 1 mm > 9cm and 9 mm > 9 cm and 7 mm
9cm and 7 mm > 9cm and 1 mm > 9 cm and 9 mm
Correct answer: 9cm and 9 mm > 9cm and 7 mm > 9 cm and 1 mm
Q3.
Which number sentence is correct?
2cm and 1mm > 2cm and 70 cm > 2cm and 90 mm
2cm and 70 cm > 2cm and 1 mm > 2cm and 90 mm
2cm and 90 cm > 2cm and 1 mm > 2cm and 70 mm
Correct answer: 2cm and 90 cm > 2cm and 70 mm > 2cm and 1 mm
Q4.
Which number sentence is correct?
70cm and 10mm < 70cm and 1 mm < 70cm and 9 mm
70cm and 1mm < 70cm and 10 mm < 70cm and 9 mm
Correct answer: 70cm and 1mm < 70cm and 9 mm < 70cm and 10 mm
70cm and 9 mm < 70cm and 10 mm < 70cm and 1 mm
Q5.
Which number sentence is correct?
4m and 10cm < 4m and 10 mm < 4m and 1 cm
4m and 10mm < 4m and 1 cm < 4m and 10 cm
4m and 10mm < 4m and 10cm < 4m and 1 cm
Correct answer: 4m and 10mm = 4m and 1 cm < 4m and 10 cm