Question

The picture shows a way to find

.

Two rectangles each divided into 5 parts and 2 parts shaded. There is a plus sign between these two rectangles.

Which picture shows another way to find

?


Four rectangles each divided into 5 parts and 1 part shaded. There is a plus sign between each rectangle.


Two rectangles each divided into 5 parts and 1 part shaded. There is a plus sign between these two rectangles.


Two rectangles each divided into 5 parts. The first rectangle has 2 parts shaded and the second rectangle has 1 part shaded. There is a plus sign between these two rectangles.


Four rectangles each divided into 5 parts and 2 parts shaded. There is a plus sign between each rectangle.

Answer 1

Choose the first picture (four rectangles each with 1 of 5 parts shaded).

Reason: 2/5 + 2/5 = 4/5, and 1/5 + 1/5 + 1/5 + 1/5 = 4/5, so the first picture shows an equivalent way to make 4/5.