148 Multiplication and Division Concepts
Rigorous Problem Solving with the Concept of
Perfect Squares and Near Squares 2
Kolby and Kirk are playing X Marks the Spot. In this game,
players roll a number, multiply it by itself, and mark the
product on the game board. Kolby rolled 3, 5, and 9. Kirk
rolled 4, 7, and 8.Part A
Which set of numbers represent Kirk’s products?o 4, 7, and 8
o 14, 17, and 18
o 44, 77, and 88
o 40, 70, and 80
o 8, 14, and 16
o 16, 49, and 64Part B
Joey says 7 x 8 = 56 because 7 x 7 = 49 and 49 + 7 = 56. Do you
agree with Joey?
Why or why not?© 2016, Math Intervention: Grades 3–5, Jennifer Taylor-Cox, Routledge