# Fact Family Fun!

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Did you know an icosahedron has 20 faces, each an equilateral triangle? Ever wondered how your students could use an icosahedron to practise fact families? These awesome new Mathematics resources are a great, hands-on fact family activity for middle years primary students who are learning about the relationships between groups of three numbers.

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## What is a Fact Family?

Fact families are groups of three numbers that are related to each other and can create four different number sentences.

### Addition and Subtraction Fact Families

Some fact families can create two addition number sentences and two subtraction number sentences.

For example, the numbers 3, 4 and 7 form a fact family and can be represented by the following number sentences:

3 + 4 = 7
4 + 3 = 7

7 – 3 = 4
7 – 4 = 3

### Multiplication and Division Fact Families

Some fact families can create two multiplication number sentences and two division number sentences.

For example, the numbers 3, 12 and 36 form a fact family and can be represented by the following number sentences:

3 x 12 = 36
12 x 3 = 36

36 ÷ 12 = 3
36 ÷ 3 = 12

We have a great, editable Multiplication and Division Fact Families PowerPoint too!

## Hands-On Fact Family Activities

Download these awesome fact family icosahedron resources for your students to use when practising fact family number sentences.

1. Provide each student with an icosahedron template and a worksheet.
2. Students cut out the net, fold along the lines and glue the tabs to form their own icosahedron.
3. Students roll the icosahedron to land on one fact family and complete the two multiplication and two division number sentences underneath the corresponding number on the blank answer page.

If you and your students love hands-on activities as alternatives to traditional worksheets, you might like to check out these other awesome fact families resources:

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