Which One Doesn't Belong? Little Ladybugs

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: A 10-frame holds 5 red and 5 green ladybugs. 4 yellow ladybugs are below. B: A ten-frame holds 7 red ladybugs. 7 yellow ladybugs are below. C: A circle with10 red ladybugs is beside another circle with 4 yellow ladybugs. D: A 10-frame holds 10 red ladybugs. 5 yellow ladybugs are below.


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?