Operations and algebraic thinking
3.OA.A.4
Determine the unknown whole number in a multiplication or division equation.
Practice for this standard
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Multiplication
Times tables, arrays and area models, and long multiplication up to multi-digit factors.
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Division
Sharing and grouping, division facts, remainders, and long division that a kid can follow.
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Pre-algebra
One-step equations with a letter in them, and undoing an operation to solve.
Official wording and the full standard: CCSS.MATH.CONTENT.3.OA.A.4