Missing number worksheets (1–100)
Eight hundreds charts with about a third of the numbers missing, in different places on each sheet.
Best fit: 1st–2nd grade · 8 sheets, answer keys included · Free, no sign-up
The full set: 8 worksheets with answer keys
Eight sheets in the same layout with different problems: download them as one PDF or print one at a time.
Worksheets
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Sheet 1
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Sheet 2
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Sheet 3
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Sheet 4
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Sheet 5
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Sheet 6
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Sheet 7
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Sheet 8
Answer keys
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Sheet 1 answers
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Sheet 2 answers
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Sheet 3 answers
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Sheet 4 answers
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Sheet 5 answers
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Sheet 6 answers
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Sheet 7 answers
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Sheet 8 answers
About these worksheets
On a full hundreds chart every number is there to read. With about a third of them blank, the child has to work each gap out from the numbers around it. Filling the gaps means using the rows and columns: one more, one less, ten more, ten less. A blank just below 37 has to be 47. It makes a good follow-up once the ordinary hundreds chart feels easy, and because the blanks move on every sheet, all 8 are worth doing.
Frequently asked questions
How is this different from a blank hundreds chart?
A blank chart is filled in order, start to finish. Here the anchors are scattered, so every gap is a little reasoning puzzle: use the row and column to deduce the number.
What strategies should kids use?
Rows mean one more or one less; columns mean ten more or ten less. If they’re counting from 1 every time, point out the column shortcut.
How many numbers are missing?
Between 27 and 39 on each chart, about a third of the hundred. The 1 in the top left corner is always shown, so there is somewhere to start.