Lesson 3.103.10 · Part II
Start hereWords, worked example, and sentence starters
Learning target I can convert measurement units using ratios and conversion factors.
Start hereWords for this lesson
Read each word before you begin. Say it out loud.
| Word | What it means | Example |
|---|---|---|
| Conversion FactorSpanish: Factor de conversión | A ratio that helps you change one unit into another. | 1 foot = 12 inches, so the factor is 12 |
| UnitSpanish: Unidad | A standard amount used to measure, like an inch or a liter. | Inches, feet, pounds, ounces |
| EquivalentSpanish: Equivalente | Having the same value, just in different units. | 2 feet = 24 inches |
| RatioSpanish: Razón | A way to compare two amounts, like 3 to 2. | 12 inches per 1 foot |
| Customary unitsSpanish: Unidades usuales (sistema inglés) | The U.S. way of measuring, like inches, feet, and pounds. | 12 inches = 1 foot, 3 feet = 1 yard, 16 ounces = 1 pound |
| Metric unitsSpanish: Unidades métricas | A way of measuring by 10s, like meters, liters, and grams. | 1 meter = 100 centimeters, 1 kilogram = 1,000 grams |
Say it and write itSentence starters
Finish each sentence out loud with a partner. Then use them in your writing.
Word bank Conversion FactorUnitEquivalentRatioCustomary unitsMetric units
Watch outA common mistake
A common mistake in Convert Measurement Units is applying the conversion factor in the wrong direction — for example, converting 4 feet to inches by dividing (4 ÷ 12 = 0.33 inches) instead of multiplying (4 × 12 = 48 inches), or converting 80 ounces to pounds by multiplying (80 × 16 = 1,280 pounds) instead of dividing (80 ÷ 16 = 5 pounds). Before you answer, ask: am I changing to a SMALLER unit (there will be MORE of them, so multiply) or a BIGGER unit (there will be FEWER of them, so divide)?
Lesson 3.103.10 · Part II
Apply Day · Version ASupported practice
Learning target I can convert measurement units using ratios and conversion factors.
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1Complete each step, then write the final answer.
There are 3 feet in 1 yard. How many feet are in 7 yards?
Show your workHint The scale factor from 1 yard to 7 yards is 7. Multiply the feet by 7.
Final answer: -
2Complete each step, then write the final answer.
There are 100 centimeters in 1 meter. How many centimeters are in 6 meters?
Show your workHint The scale factor from 1 meter to 6 meters is 6. Multiply the centimeters by 6.
Final answer: -
3Complete each step, then write the final answer.
There are 16 ounces in 1 pound. How many ounces are in 3 pounds?
Show your workHint The scale factor from 1 pound to 3 pounds is 3. Multiply the ounces by 3.
Final answer:
Lesson 3.103.10 · Part II
Apply Day · Version BCore practice
Learning target I can convert measurement units using ratios and conversion factors.
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1Complete each step, then write the final answer.
Which is longer: 4 yards or 11 feet? Write the longer length in feet.
Show your workFinal answer: -
2Complete each step, then write the final answer.
A fence is 27 feet long. How many yards long is it?
Show your workFinal answer: -
3Complete each step, then write the final answer.
There are 12 inches in 1 foot. How many inches are in 10 feet?
Show your workFinal answer:
Lesson 3.103.10 · Part II
Apply Day · ChallengeExtension
Learning target I can convert measurement units using ratios and conversion factors.
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1Circle the letter of the best answer. Show how you know.
Convert 3 hours to seconds using 1 hour = 60 minutes and 1 minute = 60 seconds.
- A120 seconds
- B180 seconds
- C3,600 seconds
- D10,800 seconds
Show your work -
2Complete each step, then write the final answer.
Dee changes 6 yards to inches. She multiplies 6 × 12 and gets 72 inches. What is the correct number of inches?
Show your workFinal answer: -
3Complete each step, then write the final answer.
A ribbon is 8 yards long. How many inches long is it? Use 1 yard = 3 feet and 1 foot = 12 inches.
Show your workFinal answer: