SOURCE: Arizona Department of Education, Arizona Mathematics Standards 3rd Grade, Sample Math Assessment Test Question

Introduction to AZ Math Standard

Arizona Mathematics Standards 3rd Grade

Math Lesson Curriculum Aligned to AZ Standard for Operation and Algebraic Thinking 3.OA.A.4

Determine the unknown whole number in an addition or subtraction equation relating three whole numbers. For example, determine the unknown number that makes the equation true in each of the equations 13 - ☐ = 6, 13 - ☐ = 7, 13 + ☐ = 6, 13 + ☐ = 7.

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