Which One Doesn't Belong? Comparing Decimals

Look at this set of four comparison statements. 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. has the words 'Three and four tenths is greater than three and one hundred twenty-six thousandths.' B: 2.14 < 2.4. C: 4.3 > 3.4. D. shows 5.555 and 5.55 with an empty circle between for a comparison symbol.


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


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