Math Intervention 3–5 Grade

Addition and Subtraction Concepts 65

Rigorous Problem Solving with the Concept of
Adding and Subtracting Tens 2

Hundred Chart Piece

Part A

Which set of numbers fi lls in all of the missing numbers on
the piece of the hundred chart?

o 51, 52, 54, 55, 56, 57, 58
o 42, 43, 54, 55, 65, 66, 76
o 51, 52, 54, 64, 65, 66, 76
o 42, 52, 54, 64, 65, 66, 76
o 43, 44, 54, 55, 65, 66, 67

Part B

How do you know that 73 is not one of the missing numbers?

Justify your answer with at least two equations.