Which One Doesn't Belong? Less Than, Greater Than

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: 1 ten-cube train with 3 single cubes < 3 ten-cube trains and 1 single cube. B: 45 > 37. C: 32 < 38. D: 31 is less than 41.


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


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