Unknown Number in Addition Equation Assessment

Unknown Number in Addition Equation Assessment
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Common Core Standards
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Student will solve for the unknown whole number in these 10 addition equations. Addition equations have sums within 20.


CCSS.MATH.CONTENT.1.OA.D.8
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 8 + ? = 11, 5 = _ - 3, 6 + 6 = _.
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