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Write the missing numbers that add up to 100. The first one is done for you. |
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42 + |
56 + 44 = 100 |
46 + 54 = 100 |

84 + 16 = 100 |
78 + 22 = 100 |
62 + 38 = 100 |

5 + 95 = 100 | 67 + 33 = 100 | 24 + 76 = 100 |

27 + 73 = 100 |
79 + 21 = 100 |
62 + 38 = 100 |

28 + 72 = 100 |
15 + 85 = 100 | 48 + 52 = 100 |

32 + 68 = 100 | 23 + 77 = 100 | 64 + 36 = 100 |

70 + 30 = 100 | 71 + 29 = 100 |
60 + 40 = 100 |

14 + 86 = 100 |
42 + 58 = 100 | 7 + 93 = 100 |

89 + 11 = 100 | 18 + 82 = 100 |
80 + 20 = 100 |

82 + 18 = 100 | 83 + 17 = 100 | 25 + 75 = 100 |

12 + 88 = 100 |
77 + 23 = 100 | 8 + 92 = 100 |

91 + 9 = 100 | 67 + 33 = 100 | 47 + 53 = 100 |

95 + 5 = 100 |
44 + 46 = 100 |
49 + 51 = 100 |

62 + 38 = 100 |
16 + 84 = 100 |
72 + 28 = 100 |

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The various resources listed below are aligned to the same standard, (2NBT05) taken from the CCSM (Common Core Standards For Mathematics) as the Addition and subtraction Worksheet shown above.

*Fluently add and subtract within 100 using strategies based on place value, properties of operations, and/or the relationship between addition and subtraction. *

- Addition with making 20 e.g. 18 + 7 = 25
- Addition with making multiples of 10 e.g. 66 + 8 = 74

- Making (Bridging) Multiples of 10 e.g. 17 + 5, 78 + 7

- Number bonds to 20 e.g.8 + ___ = 20
- Number bonds to 30 e.g.26 + ___ = 30
- Number bonds to 40 e.g.12 + ___ = 40
- Number bonds to 50 e.g.17 + ___ = 50
- Number Bonds To 100 (with blank number lines)

- Adding To Subtract e.g. 45 - 27 = (45+3 = 48) - (27+3=30) = 18

- 2-digit & 1-digit - no regrouping e.g. 34 + 5, 56 - 4
- 2-digit numbers - no regrouping e.g. 42 + 36, 34 + 12
- 2-digit numbers - regrouping e.g. 47 + 16, 78 - 29
- 2-digit - 1-digit - no regrouping e.g. 68 - 5
- 2-digit - 1-digit - regrouping e.g. 65 - 7
- 2-digit - 2 -digit - no regrouping e.g. 86 - 43
- 2-digit - 2-digit - regrouping e.g. 57 - 39

Similar to the above listing, the resources below are aligned to related standards in the Common Core For Mathematics that together support the following learning outcome:

*Use place value understanding and properties of operations to add and subtract*

- Adding 3 Numbers (in easiest order) e.g. 27 + 13 + 15 (From Worksheet)
- Addition & Subtraction: 1 of 3 (within 1000) (From Worksheet)
- Addition & Subtraction: 2 of 3 (within 1000) (From Worksheet)
- Addition & Subtraction: 3 of 3 (within 1000) (From Worksheet)
- Subtracting with Regrouping Ten (includes base ten block visuals) (From Worksheet)
- Subtraction with regrouping (with place value blocks) (From Worksheet)
- Three 1-digit numbers e.g. 3 + 4 + 8 (From Worksheet)
- Three 2-digit numbers e.g. 35 + 14 + 26 (From Worksheet)
- Four 1-digit numbers e.g. 3 + 4 + 8 + 2 (From Worksheet)