# Lesson 4

Conversión de unidades métricas y división entre potencias de diez

### Lesson Purpose

The purpose of this lesson is for students to convert from a smaller metric length unit to a larger unit using a context of track and field. Students observe patterns when different numbers are divided by 10, 100, or 1,000.

### Lesson Narrative

In this lesson, students extend their understanding of metric length conversions. In the previous lesson, students converted from a larger unit to a smaller unit, often resulting in very large numbers because they multiplied by powers of 10. In this lesson, students convert from a smaller unit to a larger unit, resulting in a smaller number, and sometimes, a decimal. Students notice how the digits in a number shift to the right when dividing by powers of 10 and consequently whole numbers often become decimals (MP7).

• Representation

### Learning Goals

Teacher Facing

• Convert metric lengths from a smaller unit to a larger unit.
• Recognize and explain patterns in the placement of the decimal point when a decimal is divided by a power of 10.

### Student Facing

• Convirtamos unidades.

Addressing

### Lesson Timeline

 Warm-up 10 min Activity 1 15 min Activity 2 15 min Lesson Synthesis 10 min Cool-down 5 min

### Teacher Reflection Questions

If you were to teach this lesson over again, what would you do differently? How would your proposed changes support student learning?

### Suggested Centers

• Would You Rather? (2–5), Stage 2: Compare to Smaller Units (Supporting)
• Compare (1–5), Stage 5: Fractions (Supporting)

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