Grade 1 · Numbers & operations

Addition facts within 20 practice

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
Sample questions

Try 8 for free

Question 1easy

What is 3+23 + 2?

3+2=53 + 2 = 5.

Question 2easy

What is 4+104 + 10?

4+10=144 + 10 = 14.

Question 3easy

What is 0+160 + 16?

0+16=160 + 16 = 16.

Question 4easy

What is 0+110 + 11?

0+11=110 + 11 = 11.

Question 5easy

What is 0+60 + 6?

0+6=60 + 6 = 6.

Question 6easy

What is 0+00 + 0?

0+0=00 + 0 = 0.

Question 7easy

What is 18+218 + 2?

18+2=2018 + 2 = 20.

Question 8easy

What is 14+314 + 3?

14+3=1714 + 3 = 17.

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Games that drill addition facts within 20

These games serve this exact skill as live head-to-head matches.

Balloon Pop Math gameBalloon Pop MathPop balloons. Solve math. Win!Beam Team gameBeam TeamFly your saucer over the night farm and beam up a critter for every right answer — first to 12 wins.Blaster Gate gameBlaster GateBlast through the wall. First to clear wins.Blitz Tanks gameBlitz TanksSolve math to load shells. Out-think the battalion. Last math standing wins.
Tests that cover addition facts within 20:
i-ReadyISIP MathMAP Growth
More Grade 1 skills:
Missing addendSubtraction facts within 20Ten more / ten lessAll Grade 1 practice →

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