Question

Using the models, add


.

Two rectangles divided into 6 equal parts. The first rectangle has 3 parts shaded. The second rectangle has 1 part shaded.

Answer 1

3/6 + 1/6

Both rectangles are divided into sixths, so add the shaded sixths: 3 + 1 = 4, giving 4/6.
Simplify 4/6 by dividing numerator and denominator by 2: 4/6 = 2/3.

So the sum is 2/3 (four of the six equal parts are shaded).