High Ability Teacher

by Tracey Noe
(Ligonier, IN, United States)

The average number of red, blue, and green beanbags in a store is 136. There are 30 more red beanbags than blue beanbags. There are 15 fewer green beanbags than blue beanbags. How many green beanbags are in the store?

Here's My Answer
by Zach
(Singapore)

Step 1: This question involves the Comparison Concept. Since there are 30 more red beanbags than blue beanbags, we draw 1 long bar to represent the number of blue beanbags and another bar which is longer by 30 to represent the number of red beanbags.

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