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←MathGrade 1Equations

Knowledge atom

Find the unknown addend in ☐ + b = c

G1.EQ.08Grade 1EquationsSource mission: Missing Addends

Determines the missing first addend in an addition equation.

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Standards alignment

1.OA.D.8

Prerequisites

Common misconceptions

  • cannot begin because the leading position is blank

Required evidence

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EvidencePerformanceStatusNext step
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Determines the missing first addend in an addition equation.

Estimated time: ~5 min

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