# Subtract fractions from a whole by converting the whole to a fraction

I can subtract fractions from a whole by converting the whole to a fraction.

# Subtract fractions from a whole by converting the whole to a fraction

I can subtract fractions from a whole by converting the whole to a fraction.

## Lesson details

### Key learning points

- A fraction with the same numerator and denominator is equal to one whole.
- To subtract a fraction from a whole, convert the whole to a fraction with the same denominator as the subtrahend.
- The minuend and subtrahend have the same denominator to subtract easily.
- When the denominators are the same, you subtract the numerators using the language of unitising.

### Common misconception

Children often find it difficult to understand the idea that any whole can be represented by a fraction with the same numerator and denominator.

You might want to list down some different real life examples such as slices of pizza or pie, complete sets of sticker pages, full packs of pens/pencils. Label each example with fraction notation so the children get a firmer understanding.

### Keywords

Minuend - The minuend is the number being subtracted from.

Subtrahend - A subtrahend is a number subtracted from another. There can be more than one.

Numerator - A numerator is the top number in a fraction. It shows how many parts we have.

Denominator - A denominator is the bottom number in a fraction. It shows how many parts a whole has been divided into.

### 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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## Starter quiz

### 6 Questions

## Exit quiz

### 6 Questions

5 -

is the number of fifths equal to one whole.

10 -

is the number of tenths equal to one whole.

3 -

is the number of thirds equal to one whole.

4 -

is the number of quarters equal to one whole.