Unit 2, Lesson 13# Solve word problems with subtraction of 9 from 10.

EngageNY 60 min(s)

In this lesson, students solve word problems that invite them to use the "take from ten" subtraction strategy. For example, in solving the problem "There were 10 ants on the picnic blanket and 4 ants on the grass. 9 ants from the picnic blanket went into the anthill with a bread crumb. How many ants are not in the anthill?" students might take 9 ants from the set of 10, and then add the 1 remaining ant to the other 4 to find the solution. Throughout the lesson, they record their work with drawings and number bonds.