Part whole relationships and fact families
Home learning focus
Learn how part whole models can be used to understand fact families.
This lesson includes:
- two videos
- two activities
Part whole models
A part whole model can be helpful when working out simple calculations. They are a visual representation of writing out number sentences and can help solve missing fact family numbers.
Have a look at this part whole model.
The model shows that the numbers 20, 12 and 8 are part of a fact family. The number 20 is made of two parts, 12 and 8.
The diagram can help you work out possible number sentences in the fact family.
12 + 8 = 20
8 + 12 = 20
20 - 8 = 12
20 - 12 = 8
There's more to learn
Have a look at these other resources around the BBC and the web.