Grade 1 · Numbers & operations

Missing addend practice

Missing addend is a grade 1 math skill aligned to Common Core standard 1.OA.D.8: determine the unknown whole number in an addition or subtraction equation relating three whole numbers. Below are 3 practice questions with answers and step-by-step explanations, drawn from the 5 missing addend problems our math games drill.

CCSS 1.OA.D.85 questions in the bank
Sample questions

Try 3 for free

Question 1easy

Find the missing number: □+9=15\square + 9 = 15

6+9=156 + 9 = 15.

Question 2easy

5+□=105 + \square = 10. What is the missing number?

5+5=105 + 5 = 10.

Question 3easy

What number added to 44 makes 1212?

4+8=124 + 8 = 12.

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Math games for Grade 1

Questions like these are served inside our head-to-head math games.

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 missing addend:
i-ReadyISIP MathMAP Growth
More Grade 1 skills:
Addition facts within 20Subtraction facts within 20Ten more / ten lessAll Grade 1 practice →

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