Grade
2

Same & Different: Rainbow Arrays

Look at the two pictures. What do you notice?

A: A rectangle made from 3 rows of 5 squares each. The top row squares are red. The second row squares are orange. The bottom row squares are yellow. B: rectangle made from 4 columns of 5 squares each. The first column squares are red. The second column squares are orange. The third column squares are yellow. The fourth column squares are green.
  1. How are pictures A and B mathematically the same, and how are they different?
    • A and B are the same because …
    • A and B are different because …
  2. Make a third picture that shows a rectangular array (a picture showing rows and columns). Explain how your picture is the same as pictures A and B, and how it is different.
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Seesaw Version

Activity for the Seesaw platform

Reference for Educators

Sample problems and solutions