Grade
1

Which One Doesn’t Belong? Parts of Shapes

Look at this set of four pizzas. 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 a rectangle pizza cut into 2 equal pieces. Each piece has 2 red circles and 2 green rectangles for toppings. B. shows a rectangle pizza cut into 4 pieces. 2 pieces are smaller and 2 pieces are larger. Each piece has 1 red circle and 1 green rectangle for toppings. C. shows a square pizza cut into 4 equal pieces on the diagonal. Each piece has 1 red circle and 1 green rectangle for toppings. D. shows circular pizza cut into 4 equal pieces. Each piece has 1 red circle and 1 green rectangle for toppings.

Challenge

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

Share

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

Printable Version

Google doc for printing and copying

Seesaw Version

Activity for the Seesaw platform

Reference for Educators

Sample problems and solutions