Which One Doesn't Belong? Comparing Values

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: In numbers: one-tenth plus 20-hundredths. B: In money pieces: 3 dollar bills, 2 dimes, and 10 pennies. C: In money pieces: 3 dimes and 3 pennies. D: In money pieces: 4 dimes.


Find reasons why each of the images might not belong with the other three.


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