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Subtraction practice

Missing-number subtraction

Find an unknown minuend, subtrahend, or difference in horizontal equations using symbols and related addition facts.

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Decide what the blank represents. Use subtraction or a related addition fact to find the missing number.

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A4

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Learning objective

What this activity builds

Reason about the relationship among the whole, the part removed, and the remaining difference.

Worked example

Complete 14 − □ = 6.

8

The blank is the part removed. Since 6 + 8 = 14, the missing subtrahend is 8.

Teaching notes

Make the practice count

  • Name the role of the blank before choosing an operation.
  • Use a part-part-whole diagram when the unknown changes position.

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Configured PDF · Missing-number subtraction · US Letter

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Math SheetNameScore/ 20TeacherDateMissing-number subtractionFind the missing number in each subtraction sentence.1.___ - 17 = 172.28 - 13 = ___3.38 - ___ = 144.39 - 37 = ___5.33 - ___ = 156.___ - 27 = 67.33 - ___ = 78.___ - 13 = 249.___ - 11 = 1210.32 - 22 = ___11.38 - ___ = 1912.___ - 33 = 013.24 - 17 = ___14.35 - ___ = 115.20 - 11 = ___16.35 - 11 = ___17.___ - 16 = 218.___ - 35 = 519.40 - ___ = 2120.39 - 25 = ___math-sheet.comPage 1 / 1

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