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Computational Number Talks: Subtraction

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Problems similar to Mike Fitchett’s book

“Building Computational Fluency Grades 3-5”

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Please note:

  • These problem sets are similar to “Building Computational Fluency 3-5” by Mike Fitchett and Andrea Holmes
  • They are intended to be done mentally, but you may want to use whiteboards to have students show/explain their thinking
  • Strategies you may see: decomposing, adding up, partial difference

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Finding the Difference of Two Numbers

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51-20

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63-30

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96-30

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114-90

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143 - 40

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162 - 80

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400-59

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260-199

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900-598

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360-289

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60-49

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70-39

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60-27

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100-69

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100-39

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160-88

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400-49

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700-498

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960-758

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32-19

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64-49

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92-58

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104-38

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126-89

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154-78

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732-389

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55-27

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58-27

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133-74

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203-75

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