Unit 5, Lesson 23
Dividamos números enteros entre decimales
Grado 5
Preparation
Lesson Narrative
In the previous lesson, students divided whole numbers by one tenth and one hundredth and made generalizations about how to divide any whole number by those units. In this lesson, students extend that work to divide whole numbers by any number of tenths or hundredths (with total value less than 1). Consistent divisors are used in repetition to highlight relationships between the dividends and the quotients (MP8). Students evaluate expressions with larger divisors such as in order to encourage them to use the relationship between multiplication and division. Rather than drawing 12 unit squares and dividing all of them into groups of 2 tenths, students may draw a single whole divided into 2 tenths and then use multiplication.
- Action and Expression
None
- Calculate quotients of a whole number divided by 0.2 or 0.02 and explain (orally and in writing) strategies used.
- Interpret (orally and in writing) diagrams and expressions that represent dividing a whole number by 0.2 or 0.02.
- Dividamos números enteros entre números decimales.
Required Preparation
None
Teacher Reflection Questions
What aspects of today’s lesson allowed each of your students to see themselves as productive mathematical reasoners?