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←MathGrade 3Equations

Knowledge atom

Solve two-step equations by undoing operations

G3.EQ.05Grade 3EquationsSource mission: Variables & Two-Step Equations

Finds the unknown in equations combining two operations by undoing them in reverse order. Stretch content: two-step unknowns reach beyond the grade-3 core toward order-of-operations work — a miss here is not evidence of a grade-3 gap.

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Standards alignment

3.OA.D.8

Prerequisites

Common misconceptions

  • works left to right through the equation without undoing operations in reverse order

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Finds the unknown in equations combining two operations by undoing them in reverse order. Stretch content: two-step unknowns reach beyond the grade-3 core toward order-of-operations work — a miss here is not evidence of a grade-3 gap.

Estimated time: ~5 min

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