Multiplication and Division Concepts 147Rigorous Problem Solving with the Concept of
Perfect Squares and Near Squares 1
Joey and James 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. Joey rolled 5, 4, and 7. James
rolled 3, 6, and 8.
Part A
Which set of numbers represent Joey’s products?
o 5, 4, and 7
o 10, 8, and 14
o 15, 14, and 17
o 50, 40, and 70
o 8, 10, and 15
o 50,40, and 70
o 25, 16, and 49
Part B
Kolby says 6 x 7 = 37 because 6 x 6 = 36 and 36 + 1 = 37.
Do you agree with Kolby?
Why or why not?
© 2016, Math Intervention: Grades 3–5, Jennifer Taylor-Cox, Routledge