Unit 2, Lesson 14
Situaciones de área
Grado 5
Preparation
Lesson Narrative
In previous lessons, students used a range of skills to solve problems involving the multiplication of a whole number by a fraction. They represented situations with diagrams and expressions, and they solved problems using a variety of strategies.
In this lesson, students use their conceptual understanding to build procedural fluency with multiplication of whole numbers by fractions. Students also apply these skills to solve problems in an Info Gap activity. Students use what they know about interpreting multiplication as area to ask questions of their peers about the missing information in the problems and explain their reasoning for needing that information.
As in the previous lessons, students will encounter problems with fractions greater than 1. Students are encouraged to rewrite fractions greater than 1 as whole numbers when possible. They are not required to rewrite fractions greater than 1 as mixed numbers.
- Representation
None
- Determine what information is needed to solve a multi-step area problem involving multiplication of a whole number and a fraction. Ask (orally) questions to elicit that information.
- Apliquemos lo que hemos aprendido sobre multiplicación de fracciones.
Required Preparation
Create a set of cards from the blackline master for each group of 2.
Teacher Reflection Questions
If you were to teach this lesson over again, what activity would you redo? How would your proposed changes support student learning?