Missing addend. Game on.

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
Kickoff

3 plays. No signup.

Warm-upeasy

Find the missing number: â–¡+9=15\square + 9 = 15

6+9=156 + 9 = 15.

Mid-gameeasy

5+â–¡=105 + \square = 10. What is the missing number?

5+5=105 + 5 = 10.

Buzzer beatereasy

What number added to 44 makes 1212?

4+8=124 + 8 = 12.

Overtime

2 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 missing addend:
i-ReadyISIP MathMAP Growth
Reporting domains for this skill
MAP Growth Math K-2: Operations and Algebraic Thinkingi-Ready Grade 1: Operations and Algebraic ThinkingISIP Math Grades PK-5: Computations and Algebraic Thinking
More Grade 1 skills
Addition facts within 20Subtraction facts within 20Ten more / ten lessAll Grade 1 practice →

Drill it inside a game.

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