Unit 5, Lesson 4
Construyamos fracciones a partir de fracciones unitarias
Grado 3
Preparation
Lesson Narrative
In the previous lesson, students named non-unit fractions and made sense of the notation used to write them. In this lesson, students play a game in which they build non-unit fractions from unit fractions (for example, they try to collect enough cards showing to make ). They record these fractions on a fraction-strip diagram. Then, students partition and shade diagrams to represent situations involving fractional lengths and consider the location of the endpoint of a fractional length. This will be helpful in subsequent lessons, when students represent fractions on a number line.
- Engagement
- MLR8
- Justify (orally) that a non-unit fraction has the same value as a number of unit fractions.
- Represent (using diagrams) a word problem involving non-unit fractions.
- Construyamos otras fracciones a partir de fracciones unitarias.
Required Materials
Activity 2
Required Preparation
- Create a set of cards from the blackline master for each group of 2 students.
Teacher Reflection Questions
How did having visual representations help students think about building fractions from unit fractions in today’s lesson?