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1oa8 Worksheets

Operations and Algebraic Thinking Work with addition and subtraction equations. 8Determine the unknown whole number in an addition or subtraction equation relating to three whole numbers. For example, determine the unknown number that makes the equation true in each of the equations 8 + ? = 11, 5 = ?– 3, 6 + 6 = ?.

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1oa8 Worksheets - Solving Mixed Problems within 20 (+ -) worksheet

Load up one problem at a time! Ideal for projectors, tablets and computers.

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Solving Mixed Problems within 20 (+ -)

1oa8

Practice finding a missing number in addition and subtraction equations
Get comfortable seeing the unknown in different spots — at the beginning, middle, or end of an equation

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