# Calculate the difference in different contexts

I can calculate the difference in different contexts.

# Calculate the difference in different contexts

I can calculate the difference in different contexts.

## Lesson details

### Key learning points

- You calculate the difference by counting on from the known part to the whole.
- The difference is the answer to a subtraction calculation.
- The difference is one of the parts that make the whole.

### Common misconception

Children think that 'counting on' is used solely as a strategy in addition.

Children should be made aware that the strategy for 'counting on' can be used in addition but is used as a strategy for subtraction in this lesson where we are finding the difference between two numbers close in value.

### Keywords

Difference - The amount which a number is greater or smaller.

Subtraction - To partition one part from another (the subtrahend from the difference), or to decrease an amount by taking an amount away.

Count on - A mental strategy used to add numbers.

### 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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