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Common Core · Grade 3 · Operations and Algebraic Thinking

Standard 3.OA.A.4

Free lessons and printable worksheets aligned to Common Core math standard 3.OA.A.4.

2 lessons2 worksheets

Lessons for 3.OA.A.4

Multiplication and division undo each otherDividing by a number reverses multiplying by it.Lesson

Using a letter for the unknown numberA letter stands for the number we do not know yet in an equation that models a story.Lesson

Printable Worksheets

Multiplication and division undo each other worksheet (PDF)Printable worksheet with answer keyPreview

Using a letter for the unknown number worksheet (PDF)Printable worksheet with answer keyPreview