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Grade 4 · unit review

Review: Convert Measurements and Use Fractional Data

Convert larger to smaller units, calculate time, solve rectangle dimensions, and summarize line-plot measures.

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Bring the unit skills together

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Unit review questions
1. Using 1 foot=12 inches, convert 6 feet to inches.
Need a hint?
  • Write the conversion relation before choosing multiplication.
  • More smaller-unit counts do not mean the measured quantity increased.
2. On the same afternoon, how many minutes pass from 1:34 to 4:21?
Need a hint?
  • Count complete hours separately from partial-hour minutes.
  • Hour labels use a sixty-minute cycle, not one hundred minutes.
3. A rectangle area is 64 square meters and length is 8 m. What is its width in meters?
Need a hint?
  • Use multiplication to verify the recovered dimension.
  • Area and side lengths have different units.
4. Lengths are 5/8, 5/8, and 3/8 inch. What is the total in inches?
Need a hint?
  • Keep repetitions when summing measurements.
  • Observation count and total measured length answer different questions.

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Use the skills in a new task

A rectangle area is 72 square meters and its length is 9 meters. Find width and perimeter. Convert the length into centimeters.

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  • Say why each calculation or shape choice follows the ideas in this unit.
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Compare with a model response

Width is 72÷9=8 m. Perimeter is 2(9+8)=34 m. Since 1 m=100 cm, the nine-meter length is 900 cm. Area units and boundary length units remain distinct.

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