Open Middle®
Directions: Using the digits 1 to 9 at most one time each, fill in the boxes to complete the following statement:
Leaving a ____ dollar tip for a bill of _____ is the same as leaving a ____ dollar tip for a bill of _____
Hint
What do you about tips? What do you need to do to make them equal?
Answer
There are multiple correct answers, one example would be $2 for $4 is the same as a $3 for $6
Source: Bryan Anderson
1. There are no boxes here as stated in the directions.
2. The hint says “What do you about tips?” Do you mean “What do you know about tips?”
3. The answer examples are both 50% tips. Is that reasonable?
How about $1 for $4 and $2 for $8?
And shouldn’t it say something about making a ‘true’ statement?