Using Picture Graphs

Organize students to share their problem solutions and strategies with a partner. Discussion of students' strategies reminds students that there are often many ways to solve a problem and that communicating a solution path is important.

To encourage students to listen to one another's strategies, ask students to explain their strategies for a problem to a partner. Each member of a pair must explain his or her strategy well enough so that the partner can then show or tell how the problem was solved to the rest of the class.

Question 13 asks, “About how many animals are in the sample?” It is more efficient to use mental math to estimate the total number of animals in the sample than to find the exact answer. One way is to use desk number lines to find convenient numbers and then quickly add them.