Subtraction
Subtraction across zero
Practice multi-digit subtraction that requires regrouping through one or more zero places without losing place-value meaning.
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Missing-digit subtraction
Restore hidden digits in vertical multi-digit subtraction by reasoning column by column from the known result.
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Study the known digits and result. Work through each column, account for regrouping, and write the digit that makes the equation true.
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Customize this worksheetLearning objective
What this activity builds
Use place value, regrouping evidence, and inverse operations to determine missing digits.
Worked example
Complete 5□ − 27 = 31.
The missing digit is 8.
The starting number must be 31 + 27 = 58, so 58 − 27 = 31.
Teaching notes
Make the practice count
- Verify a completed problem with addition.
- Begin with one blank and no regrouping before combining several blanks and exchanges.
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Related activities
Subtraction
Multi-digit subtraction
Subtract two-, three-, or four-digit numbers vertically with configurable regrouping and subtraction across zero.
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