Which One Doesn't Belong? Hundreds, Tens, Ones

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!

Each picture shows base ten pieces (number pieces). A: 5 tens and 7 ones. B: 1 hundred piece and 5 ones. C: 3 hundreds, 3 tens, and 3 ones. D: 1 hundred piece and 2 tens.


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?