Unit 2, Lesson 10
Longitudes de lado fraccionarias y menores que 1
Grado 5
Preparation
Lesson Narrative
In the previous lesson, students extended their understanding of multiplication to find the area of rectangles with a side length that is a unit fraction.
In this lesson, students will find the area of rectangles with a whole number side length and a non-unit fraction side length. Students will apply what they learned in earlier lessons to area representations and recognize that a side length of is equivalent to a side length of . This allows them to find areas by counting the number of pieces covering the area and then multiplying this number by the unit fractional area of each piece. For example, in the image below, there are 8 shaded pieces and each piece has an area of square unit.
- Representation
- MLR2
- Determine the area of a rectangle with a whole-number side length and a rational side length less than 1 and represent it with a multiplication expression.
- Encontremos el área de rectángulos que tienen un lado de longitud fraccionaria.
Required Preparation
None
Teacher Reflection Questions
In the next lesson, students will find the area of a rectangle where one of the side lengths is a fraction greater than 1. Try finding the area of a rectangle that is by 6. How do the understandings in today’s lesson support how you found the area of that rectangle?