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Grade 3 · unit review

Review: Solve Time, Mass, and Liquid-Volume Problems

Measure elapsed minutes and calculate with grams, kilograms, and liters in supplied records.

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Unit review questions
1. On the same afternoon, how many minutes pass from 3:46 to 4:20?
Need a hint?
  • An hour contains sixty minutes.
  • Do not subtract colon-free clock labels as ordinary base-ten numbers.
2. Two supplied masses are 200 g and 105 g. What is their combined mass in grams?
Need a hint?
  • Keep the same mass unit throughout the calculation.
  • Do not introduce an unstated container mass into this supplied model.
3. 24 liters are shared equally among 4 containers. How many liters are in each?
Need a hint?
  • Label the quotient as liters per container.
  • Container count and liquid volume are different quantities.
4. Which unit fits the interval between two clock times?
Need a hint?
  • Name the attribute before choosing its unit.
  • A unit for one attribute cannot label another attribute’s result.

The download contains your current choices and any checked feedback. Keep the separate transfer-task work in your own document; downloading its instructions does not mark it complete.

Use the skills in a new task

A session runs from 2:45 to 3:20. A fictional container holds 8 liters divided equally into four smaller containers. Solve both with units.

Work on paper or in your own document. Explain the choices you made.

  • Draw or label the numbers or shape features the task gives you.
  • Say why each calculation or shape choice follows the ideas in this unit.
  • Check that your answer fits the story or drawing in the task.
Compare with a model response

Elapsed time is fifteen minutes to 3:00 plus twenty more, or 35 minutes. Eight liters shared into four containers gives 2 liters each. Minutes and liters measure different quantities.

A different response can also meet the criteria. Compare the evidence and reasoning, rather than copying the wording.