# Create addition and subtraction problems

I can create problems involving the addition and subtraction of two-digit numbers.

# Create addition and subtraction problems

I can create problems involving the addition and subtraction of two-digit numbers.

## Lesson details

### Key learning points

- When creating problems, we must decide whether we want to create an addition or a subtraction problem.
- Addition problems can involve combining two parts to make the whole.
- Addition problems can also involve increasing one part by the other part to reach the whole.
- Subtraction problems can involve partitioning one part from the whole to find the remaining part.
- Subtraction problems can also involve decreasing the whole by one part to find the remaining part.

### Common misconception

Children can have difficulty creating problems because they cannot process the amount of information needed and organise their thinking in the way necessary to know how to start.

Give criteria, such as the context, the numbers involved, an equation to represent, or a given structure of addition or subtraction to help focus and structure their thoughts.

### Keywords

Addition - Addition involves finding the total, or sum, by combining two or more numbers.

Subtraction - Subtraction involves taking one number away from another.

Bridge 10 - An addition or subtraction strategy where numbers are partitioned to reach the previous or next multiple of 10, so bonds to 10 can be used to calculate more efficiently.

### 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

74 − 19 − 20 = ?

84 − 40 − 31 = ?

69 − 20 − 33 = ?