Convert Measurement Units

6.AT.3c · Unit 4 · Lesson 6

Name   Period

Objectives / Objetivos

Content Objective: I can convert measurement units using ratios and conversion factors.

Language Objective: I can explain my conversion using the words conversion factor, unit, equivalent, and ratio.

Key Idea / Idea clave

Multiply when changing to a smaller unit, and divide when changing to a bigger unit.

I Notice / Observo

  • Why might the blueprint and the parts catalog use different units?
  • How many inches are in 1 foot? How many feet in 1 yard?

I Wonder / Me pregunto

  • How do you decide whether to multiply or divide when converting?

Vocabulary / Vocabulario

Term / TérminoDefinition / Definición
Conversion Factor
Factor de conversión		A ratio that helps you change one unit into another.
Una razón que te ayuda a cambiar una unidad por otra.
Unit
Unidad		A standard amount used to measure, like an inch or a liter.
Una cantidad estándar para medir, como una pulgada o un litro.
Equivalent
Equivalente		Having the same value, just in different units.
Tener el mismo valor, solo en unidades distintas.
Ratio
Razón		A way to compare two amounts, like 3 to 2.
Una manera de comparar dos cantidades, como 3 a 2.
Customary units
Unidades usuales (sistema inglés)		The U.S. way of measuring, like inches, feet, and pounds.
La forma de medir de EE. UU., como pulgadas, pies y libras.
Metric units
Unidades métricas		A way of measuring by 10s, like meters, liters, and grams.
Una forma de medir de 10 en 10, como metros, litros y gramos.

Practice Preview / Vista previa de práctica

  1. How many inches are in 7 feet?
    1. 84 inches
    2. 72 inches
    3. 70 inches
    4. 96 inches
  2. Match each measurement to its equivalent value.
  3. A shelf is 30 inches long. How many feet and inches is that?
    1. 2 feet 6 inches
    2. 3 feet 0 inches
    3. 2 feet 8 inches
    4. 1 foot 18 inches
  4. Find the Conversion Error
    1. Step 1: Convert 6 feet to yards — 6 feet → yards
    2. Step 2: Use conversion factor — 1 yard = 3 feet
    3. Step 3: Multiply — 6 × 3 = 18 yards
    4. Step 4: Final answer — 6 feet = 18 yards

    Which step has the mistake? Explain it and write the correct work.

Reflection / Reflexión

One thing I learned today / Una cosa que aprendí hoy: