Subtract Whole Tens — Missing Numbers Worksheets for 1st Grade
Solve for the missing minuend or subtrahend when every value is a whole ten. 15 free printable worksheets, each with an answer key.
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Click a worksheet to open the PDF, or grab the matching answer key. Every sheet prints on one page.
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Subtract Whole Tens — Missing Numbers: what children learn
This combines two skills at once — whole-tens subtraction and missing-number thinking — applying the same single-digit fact (like __ - 3 = 4) at a bigger scale (__ - 30 = 40).
Subtract Whole Tens — Missing Numbers: worked example
__ - 30 = 40 70
Think of it as tens: what number of tens, minus 3 tens, leaves 4 tens? Since 7 - 3 = 4, the missing amount is 7 tens, or 70.
Subtract Whole Tens — Missing Numbers: a common mistake to watch for
Kids sometimes forget the trailing zero and answer "7" instead of "70" — connecting it back to the single-digit fact helps this stick.
Subtract Whole Tens — Missing Numbers: how to help at home or in class
Use bundles of ten with a cup hiding some of them. Say, there were nine tens, and some went into the cup, leaving four; how many are hiding? Have your child check by adding back. Take turns hiding bundles and writing the number sentence on paper. Look for the pattern in tens: the ones digit is always zero. When your child answers either a missing start or a missing difference and checks it, they are ready for mixed-up practice.
What is on these Subtract Whole Tens — Missing Numbers worksheets
This set has 15 different worksheets for 1st grade, with 23 questions on each and a matching answer key for every sheet. The instruction printed on each worksheet is: “Find the missing number.”
Example questions like the ones on these worksheets, with their answers:
- 10 - __ = 010
- 70 - __ = 6010
- __ - 10 = 2030
- __ - 20 = 3050
- 80 - __ = 1070
- __ - 10 = 1020
- 90 - __ = 1080
- __ - 60 = 3090
Every answer on every sheet is checked by a separate program before the worksheet is published. How we check answers