Suitable for Grades: 1st Grade, 2nd Grade
CCSS: 1.OA.D.8, 2.NBT.B.5
CCSS Description: 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 = �.
Fluently add and subtract within 100 using strategies based on place value, properties of operations, and/or the relationship between addition and subtraction.
Students will find 9 pairs of numbers that make 35.
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