LESSON 2 Using Common Denominators

Adding and Subtracting

Jackie and Jerome are making a mosaic of a sunset for their art project. A mosaic is a picture or decoration that is pieced together using small shapes. They are usually made from stone or glass. Jerome and Jackie will use orange and yellow tiles to make the sky and green tiles to make the water.
of their tiles are orange and of their tiles are yellow.

1. Estimate the fraction of all of the tiles they will use to make the sky. Show your estimate on a number line like the one below. Explain your reasoning.

2. Find an exact answer to Question 1. Show or tell how you found your answer.