## What number needed to total twenty

### Compose and Decompose Numbers: Learn

There are many ways to add two numbers together to reach a total of 20.

20 = 20 + 0 | 20 = 19 + 1 | 20 = 18 + 2 | 20 = 17 + 3 | 20 = 16 + 4 |

20 = 15 + 5 | 20 = 14 + 6 | 20 = 13 + 7 | 20 = 12 + 8 | 20 = 11 + 9 |

20 = 10 + 10 | 20 = 9 + 11 | 20 = 8 + 12 | 20 = 7 + 13 | 20 = 6 + 14 |

20 = 5 + 15 | 20 = 4 + 16 | 20 = 3 + 17 | 20 = 2 + 18 | 20 = 1 + 19 |

### Add to Twenty: Practice

#### What number needs to be added to total twenty?

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