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Year 5

Use known facts to derive common conversions over 1

I can use known facts to derive common conversions over 1

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New

Year 5

Use known facts to derive common conversions over 1

I can use known facts to derive common conversions over 1

Download all resources

Share activities with pupils

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Lesson details

Key learning points

If 1 km is equal to one lot of 1,000 m, then 3 km is equal to three lots of 1,000 m, which is 3,000 m
If 1 l = 1,000 ml, then 4 l = 4 x 1,000 ml = 4,000 ml

Keywords

Equivalent - When two or more things have the same value.
Convert - Change a value or expression from one form to another.

Common misconception

Pupils may see, for example, 3.25 kg and convert it to 3 kg and 25 g rather than 3 kg and 250 g.

The lesson presents fractions and decimals as parts of whole circles. As long as pupils know that 1 kg = 1,000 g, they should see from the representation that 0.25 kg = 250 g as 250 + 250 + 250 + 250 = 1,000

Pupils will need to have a secure grasp of the content from the previous lesson where circles and parts of circles are used to represent fractions and decimals less than one. Scaffolds in the form of pre-labelled parts of circles can be provided initially to reduce load.

Teacher tip

Licence

This content is © Oak National Academy Limited (2025), licensed on

Open Government Licence version 3.0

except where otherwise stated. See Oak's terms & conditions (Collection 2).

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Worksheet

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Starter quiz

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6 Questions

Q1.

Identify the unit fractions.

Correct answer: $$ \frac{1}{5} $$

Correct answer: $$ \frac{1}{7} $$

Correct answer: $$ \frac{1}{2} $$

$$ \frac{3}{5} $$

$$ \frac{2}{4} $$

Q2.

Match the fraction notation with the decimal notation that is equivalent.

Correct Answer:1 $$ \frac{1}{4} $$,1.25

1.25

Correct Answer:1 $$ \frac{3}{4} $$,1.75

1.75

Correct Answer:1 $$ \frac{7}{10} $$,1.7

1.7

Correct Answer:1 $$ \frac{1}{5} $$,1.2

1.2

Q3.

$$ \frac{3}{4} $$ km = 0.75 km = m

Correct Answer: 750, 750 m

Q4.

$$ \frac{4}{5} $$ m = 0.8 m = mm

Correct Answer: 800, 800 mm

Q5.

$$ \frac{7}{10} $$ l = 0.7 l = ml

Correct Answer: 700, 700ml

Q6.

How many ml of water is in this container? ml

Correct Answer: 400, 400ml

Exit quiz

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6 Questions

Q1.

Look at the image. What is this mass as a decimal?

0.4 kg

Correct answer: 1.4 kg

4.1 kg

14 kg

Q2.

Look at the image. What is this mass as a mixed number?

1 $$ \frac{1}{4} $$ kg

1 $$ \frac{4}{6} $$ kg

Correct answer: 1 $$ \frac{4}{10} $$ kg

Q3.

Convert 5.6 kg into grams.

Correct answer: 5,600 g

560 g

500 g

5,000 g

Q4.

Convert 7.25 l into ml.

7,000 ml

725 ml

Correct answer: 7,250 ml

700 ml

Q5.

Convert 1.4 kg into grams. g

Correct Answer: 1,400 , 1,400g, 1400

Q6.

Convert 8.75 km into m. m

Correct Answer: 8,750 , 8,750 m, 8750

Additional material

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