Year 3

Measuring and comparing length in mixed units (cm and mm)

Year 3

Measuring and comparing length in mixed units (cm and mm)

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Lesson details

Key learning points

  1. In this lesson, we will measure different 2D shapes and compare their perimeters in mixed units. We will compare lengths that are measured in different units to determine which is longer using greater than and less than symbols.

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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