PaginePaginepagineapp.comDetermine the unknown whole number in an addition or subtraction equation. Solve each problem and show your work.
Explain: How did you solve problem 1? Could you check it another way?
Worksheets › Grade 1 Math › Missing Numbers › Missing Numbers
Free Grade 1 math worksheet (Common Core 1.OA.D.8): missing numbers — problems with space to show work and explain reasoning, with answer key. Skill: Determine the unknown whole number in an addition or subtraction equation. Level: Grade 1 — also suits Year 2 (UK).
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It is designed for Grade 1 (ages 6–7), but use it with any child who is ready.
Determine the unknown whole number in an addition or subtraction equation.
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Missing Numbers: Practice A (1.OA.D.8) · Missing Numbers: Practice B (1.OA.D.8) · Missing Numbers: Mixed Practice & Reasoning (1.OA.D.8) · Missing Numbers: Quick Check (1.OA.D.8)
All 5 missing numbers sheets → · Grade 1 Math: all 10 skills → · All Common Core grades
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