LESSON 10 Break-Apart Products with Larger Numbers

Use the Exploring Break-Apart Products with Larger Numbers pages in the Student Activity Book to find the number of squares in larger rectangles.

A hall floor in Bessie Coleman School is covered with square tiles that are one foot on each side. The hall is five feet wide and 29 feet long. Ana and Linda are trying to find out how many tiles cover the hall floor.

Ana sketched the floor on grid paper.

1. Estimate the total number tiles on the hall floor. Be ready to explain your estimation strategy.

Ana broke the rectangle into parts like this:

1. How did Ana break apart the rectangle?
2. How many rows and columns are in each part?
3. How many squares are in each part?
4. What is the total number of squares?
5. Is Ana's answer close to your estimate from Question 1?