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Common Core · Grade 1 · Operations and Algebraic Thinking

Standard 1.OA.B.3

Free lessons and printable worksheets aligned to Common Core math standard 1.OA.B.3.

2 lessons2 worksheets

Lessons for 1.OA.B.3

Properties of additionTwo numbers added in either order give the same total.Lesson
Fact familiesOne trio of numbers gives two addition sentences and two subtraction sentences.Lesson

Printable Worksheets

Properties of addition worksheet (PDF)Printable worksheet with answer keyPreview
Fact families worksheet (PDF)Printable worksheet with answer keyPreview