New
New
Year 5

Use knowledge of decimal place value to convert between and compare metres and centimetres

I can use knowledge of decimal place value to convert between and compare metres and centimetres.

New
New
Year 5

Use knowledge of decimal place value to convert between and compare metres and centimetres

I can use knowledge of decimal place value to convert between and compare metres and centimetres.

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Lesson details

Key learning points

  1. There are 100cm in 1m.
  2. 1cm is one hundredth of a metre so you can write 1cm as 0.01m.
  3. 10cm is one tenth of a metre so you can write 10cm as 0.1m.
  4. Lengths of m and cm can be recorded using whole numbers and two decimal places.

Common misconception

Pupils may write for example 3 cm as 0.3 m.

Make connections between the headings in the place value chart and images that represent metres, tenths of metres and centimetres.

Keywords

  • Metre - A metre is a measure of length that can be abbreviated as m.

  • Centimetre - A centimetre is a measure of length that can be abbreviated as cm.

  • Convert - To exchange a unit for an equivalent unit.

Make sure children have the opportunity to develop a sense of the size of a metre in comparison to a tenth of a metre and a centimetre. Avoid giving a procedural strategy to convert from one unit to another - instead work towards generalising this.
Teacher tip

Licence

This content is © Oak National Academy Limited (2024), licensed on Open Government Licence version 3.0 except where otherwise stated. See Oak's terms & conditions (Collection 2).

Video

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6 Questions

Q1.
What is the name of the missing place value column? Give your answer as a word.
An image in a quiz
Correct Answer: hundredths, hundredth, 100th, 0.01
Q2.
Look at the sequence. Write the missing number as a decimal. 0.27, 0.28, 0.29, , 0.31, 0.32
Correct Answer: 0.3, 0.30
Q3.
One metre is equivalent to:
Correct answer: 100 cm
20 lots of 10 cm
Correct answer: 100 lots of 1 cm
10 cm
100 mm
Q4.
0.63 can be described as:
63 tenths
Correct answer: 63 hundredths
Correct answer: 6 tenths and 3 hundredths
63 decimals
Q5.
Which of these representations does not represent 0.42?
An image in a quiz
Correct Answer: An image in a quiz
An image in a quiz
An image in a quiz
Q6.
Write this representation as a decimal number.
An image in a quiz
Correct Answer: 2.53

6 Questions

Q1.
There are centimetres in 1 metre.
Correct Answer: 100, one hundred, hundred
Q2.
What is 3 hundredths of a metre written as a decimal number?
300 m
0.3 m
Correct answer: 0.03 m
Q3.
Write 27 hundredths of a metre as a decimal number: metres
Correct Answer: 0.27
Q4.
If one green bar represents one metre, how many centimetres are shown in the picture.
An image in a quiz
3 cm
30 cm
Correct answer: 300 cm
3000 cm
Q5.
Tick the values that are greater than 340 cm. Check the units carefully.
3 m 4 cm
0.34 m
Correct answer: 34 m
Correct answer: 430 cm
Correct answer: 4.03 m
Q6.
Tick the descriptions that match this image.
An image in a quiz
Correct answer: 2 m 5 cm
205 m
Correct answer: 205 cm
250 cm
Correct answer: 2.05 m