Addition facts within 20. Game on.

Addition facts within 20 is a grade 1 math skill aligned to Common Core standard 1.OA.C.6: add and subtract within 20, demonstrating fluency for addition and subtraction within 10. Below are 8 practice questions with answers and step-by-step explanations, drawn from the 202 addition facts within 20 problems our math games drill.

CCSS 1.OA.C.6202 questions in the bank
Kickoff

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Warm-upeasy

What is 3+23 + 2?

3+2=53 + 2 = 5.

Mid-gameeasy

What is 4+104 + 10?

4+10=144 + 10 = 14.

Mid-gameeasy

What is 0+160 + 16?

0+16=160 + 16 = 16.

Mid-gameeasy

What is 0+110 + 11?

0+11=110 + 11 = 11.

Mid-gameeasy

What is 0+60 + 6?

0+6=60 + 6 = 6.

Mid-gameeasy

What is 0+00 + 0?

0+0=00 + 0 = 0.

Mid-gameeasy

What is 18+218 + 2?

18+2=2018 + 2 = 20.

Buzzer beatereasy

What is 14+314 + 3?

14+3=1714 + 3 = 17.

Overtime

194 more. Played, not assigned.

The rest of the bank lives inside live head-to-head matches — the placement test finds the right starting difficulty.

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Tests that cover addition facts within 20:
i-ReadyISIP MathMAP Growth
Reporting domains for this skill
MAP Growth Math K-2: Number and Operationsi-Ready Grade 1: Operations and Algebraic ThinkingISIP Math Grades PK-5: Computations and Algebraic ThinkingStar Math All grades: number and operations
More Grade 1 skills
Missing addendSubtraction facts within 20Ten more / ten lessAll Grade 1 practice →

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