Grade 1 · Math · Subtraction
Subtraction Within 20 worksheet
Build subtraction fluency with numbers through 20.
Subtraction Within 20
Grade 1 · On-level practice · 14 questions · Version PG-3N9-IB6W
1.16 - 12 =
2.10 - 10 =
3.10 - 2 =
4.9 - 3 =
5.1 - 1 =
6.20 - 2 =
7.18 - 18 =
8.4 - 3 =
How to use this skill
Build subtraction fluency with numbers through 20.
Worked example
16 - 7 = 9. Break 7 into 6 and 1: 16 - 6 - 1 = 9.
Common mistake
Switching the order of the numbers because subtraction is not commutative.
Helpful hint
Count back to 10, then subtract what remains.
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