Knowing and using number facts including:

• Derive and recall all addition and subtraction facts for each number to at least 10, all pairs with totals to 20 and all pairs of multiples of 10 with totals up to 100 |

• Understand that halving is the inverse of doubling and derive and recall doubles of all numbers to 20, and the corresponding halves |

• Derive and recall multiplication facts for the 2, 5 and 10 times-tables and the related division facts; recognise multiples of 2, 5 and 10 |

• Use knowledge of number facts and operations to estimate and check answers to calculations |

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