Lesson 3.73.7 Small Group · Group 1
Group 1 · Set BSecond form · new problems, same idea
Learning target With my small group, I can use ratio reasoning to convert measurements between the customary and metric systems — one step at a time, with support.
Remember3.7 Small Group · Group 1
To convert between customary and metric units, scale the conversion factor in a ratio table. The answer is close, not exact. A conversion factor links customary and metric units. A ratio table helps us convert between the two systems.
Words: Conversion factor (Factor de conversión)Customary system (Sistema usual)Metric system (Sistema métrico)Approximately (Aproximadamente)Ratio table (Tabla de razones)
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1Complete each step, then write the final answer.
A bag of rice has a mass of 5 kilograms. Use 1 kilogram ≈ 2.2 pounds. About how many pounds is the bag?
Show your workHint Find the scale factor from 1 to 5. Multiply 2.2 by the same factor.
Final answer: -
2Complete each step, then write the final answer.
Use 1 kilometer ≈ 0.6 mile. About how many miles is 70 kilometers?
Show your workHint Find the scale factor from 1 to 70. Multiply 0.6 by the same factor.
Final answer: -
3Complete each step, then write the final answer.
A baby has a mass of 4 kilograms. Use 1 kilogram ≈ 2.2 pounds. About how many pounds does the baby weigh?
Show your workHint Find the scale factor from 1 to 4. Multiply 2.2 by the same factor.
Final answer: -
4Complete each step, then write the final answer.
A pool is 25 meters long. Ben swims 4 lengths. Use 1 meter ≈ 3.3 feet. About how many feet does Ben swim?
Show your workHint Scale 1 : 3.3 to one 25-meter length. Then scale again for 4 lengths.
Final answer:
Explain your thinkingSam thought 50 kilometers is 50 miles. Why is the number of miles smaller? Use the ratio 1 : 0.6 to explain.
Sentence starter The number of miles is smaller because ___. · 50 kilometers is about ___ miles because ___.