Grade
5

Which One Doesn’t Belong? Express Yourself

Look at this set of four pictures. Decide which one doesn’t belong with the other three. Use math words to describe your thinking. There are many ways to think about each one!

A. (30 times 18) minus (3 times 18). B. 27 times 18 = (25 times 18) + (2 times 18). C. (20 times 10) + (7 times 8). D. An area model shows (20 times 10) + (20 times 8) + (7 times 10) + (7 times 8).

Challenge

See if you can find reasons why each of the pictures might not belong with the other three.

Share

Explain your thinking to someone else. Do they have different reasons why one doesn't belong?

Printable Version

Google doc for printing and copying

Reference for Educators

Sample problems and solutions