Addition and Subtraction Concepts 31Rigorous Problem Solving with the Concept of
Counting On and Counting Back 2
In the game Nifty Fifty players can add or subtract the
numbers rolled. At the end of the game, the player who
scores 50 or is the closest to 50 is the winner.
Kirkland had a score of 47. In his last 3 turns, he
rolled 3, 1, 3.
Joey had a score of 54. In his last 3 turns, he rolled 2, 4, 2.
Part A
Which of the following describe how the game ended?
o Kirkland won with a score of 51.
o Kirkland lost with a score of 48.
o Kirkland won with a score of 50.
o Joey won with a score of 50.
o Joey lost with a score 49.
o Joey won with a score of 49.
o Joey won with a score of 52.
Part B
Use words or equations to explain how you know your
answer is correct.
© 2016, Math Intervention: Grades 3–5, Jennifer Taylor-Cox, Routledge