Grade
2

Which One Doesn't Belong? Addition Mission

Look at this set of 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 70 + 30 + 5 on a number line with matching jumps. B. shows 90 + 15 with number pieces. B. shows 20 + 95 on a number line with jumps of 20, 95, and 5. D. shows 105 on a number line with jumps of 60, 40, and 5.

Challenge

Find reasons why each of the pictures 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

Reference for Educators

Sample problems and solutions