New
New
Year 5

Use known facts to carry out conversions that correspond to 10 and 100 parts

I can use known facts to carry out conversions that correspond to 100 parts.

New
New
Year 5

Use known facts to carry out conversions that correspond to 10 and 100 parts

I can use known facts to carry out conversions that correspond to 100 parts.

Lesson details

Key learning points

  1. If 1 cm = 10 mm, then 3 cm = 3 x 10 mm = 30 mm
  2. If 1 m = 100 cm, then 3 m = 3 x 100 cm = 300 cm
  3. If £1.00 = 100 p, then £3.00 = 3 x 100 p = 300 p

Common misconception

Pupils might see a number like 9.2 m and incorrectly partition it into 9 m and 2 cm.

It is essential that pupils are exposed to lots of examples of visual models, such as parts of circles and number lines, so that they have a secure understanding of why, in this case, the 0.2 m is equal to 20 cm.

Keywords

  • Equivalent - If two or more things have the same value, they are equivalent.

  • Convert - Change a value or expression from one form to another.

Pupils may have had experience of multiplying the number of centimetres by 10 to get the number of millimetres. This lesson encourages children to use their knowledge of what larger units are composed of, leading them to say, 'If I know..., then I know...', as this leaves less room for error.
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).

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6 Questions

Q1.
Match the unit of measure to the correct abbreviation.
Correct Answer:centimetre ,cm

cm

Correct Answer:metre ,m

m

Correct Answer:pence,p

p

Correct Answer:millimetre,mm

mm

Q2.
Which of these numbers are multiples of 10?
10.5
Correct answer: 60
59
Correct answer: 50
25
Q3.
Which of these numbers are multiples of 100?
Correct answer: 100
105
250
Correct answer: 500
590
Q4.
How many millimetres are there in a centimetre?
Correct Answer: 10, ten, 10 mm
Q5.
How many pennies are there in £1.00?
Correct Answer: 100, one hundred
Q6.
How many centimetres are there in one metre?
Correct Answer: 100, one hundred

6 Questions

Q1.
Look at the image. What is this length written as a decimal?
An image in a quiz
0.6 cm
1.0 cm
Correct answer: 1.6 cm
0.16 cm
Q2.
Convert 1.6 cm into mm. mm
An image in a quiz
Correct Answer: 16, 16mm
Q3.
Convert £5.60 into pence. p
Correct Answer: 560, 560p
Q4.
Convert 7.25 m into cm. cm
Correct Answer: 725, 725cm, 725 cm
Q5.
Convert 8.75 m into cm. cm
Correct Answer: 875, 875 cm, 875cm
Q6.
Order these distances from shortest to longest:
1 - 2 $$ \frac{1}{4} $$ m
2 - 2.4 m
3 - 250 cm