Question

What is the sum of the two fraction models shown?

Two rectangles divided into 9 equal parts. The first rectangle has 4 parts shaded. The second rectangle has 1 part shaded.

Answer 1

Each rectangle shows ninths, so add the numerators: 4/9 + 1/9 = (4+1)/9 = 5/9. The sum is 5/9 (already in simplest form).