Which One Doesn’t Belong? Coin Collections

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. shows 5 quarters. They look like dots on a domino. B. shows 5 pennies, 1 nickel, 1 dime, and 3 quarters. The coins go smallest amount to biggest amount. C. Shows 5 pennies 1 nickel, 2 dimes and 4 quarters. The coins are not arranged. D. shows a row of 5 pennies, a row of 4 nickels, and two rows of dimes. One row of dimes has 5, the other row has 4.


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?