SubtractionUp to 20
Name: Date:
120 − 14 =
28 − 7 =
320 − 2 =
420 − 17 =
55 − 5 =
613 − 0 =
717 − 1 =
820 − 9 =
917 − 8 =
1020 − 12 =
Subtraction within 20 worksheets
Subtraction within 20 helps children move from counting back to using number bonds and make-ten strategies. These free printable sheets mix the full range while keeping every answer at zero or above.
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Subtraction within 20
The answer key prints on a separate page.
What's on this sheet
Once facts within 10 feel familiar, numbers through 20 introduce a useful new challenge: crossing the ten. A child might solve 15 − 7 by taking away 5 to reach 10, then taking away 2 more. The worksheet gives enough varied practice for that strategy to become natural.
Why this sheet works
Questions are generated from valid whole-number pairs and arranged without duplicate facts on a page. Choose the standard style for direct practice or the missing-number style to explore the relationship between addition and subtraction more deeply.
How this one works
One question from this sheet, worked through a step at a time.
20 − 14
14=10+4
20−10=10
10−4=6
- 20 − 14, across the line. Split only the 14 — the amount being taken away — and take it off in two goes.
- The tens first: 20 − 10 = 10.
- Then the ones off what is left: 10 − 4 = 6. Nothing had to borrow, because each go came off the whole number rather than off one place.