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•Common Core Standard 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 = _.
•This packet includes 4 activities at 3 levels (12 worksheets total)
•You might use each set of worksheets to differentiate for groups of students OR you may use them with your whole class to progress from easier skills with more support to harder skills with less support.