Lesson 15

The purpose of this lesson is for students to write and solve problems that involve dividing a whole number by a unit fraction and a unit fraction by a whole number.

In previous lessons, students learned how to divide a whole number by a unit fraction and a unit fraction by a whole number. They reasoned about relationships between dividends, divisors, and quotients. In this lesson, students apply what they have learned in this section to write and solve problems involving division of a whole number by a unit fraction and division of a unit fraction by a whole number. Before they solve the problems, they match each one with an equation. As students match each problem with an equation, they interpret the meaning of the equation in a context (MP2).

Gather poster from previous lesson that explains what students know and wonder about division of a unit fraction by a whole number.

• Create a set of cards from the blackline master for each group of 2.

What strategies did you anticipate today? Which did you not anticipate? What did you learn about student understanding from the strategies you did not anticipate?