Choose a Unit Appropriate to the Quantity

Supplied materials

• Paper and a pencil; drawing and spoken explanations are welcome. An adult may read directions and options aloud.
• Supplied worked-case record: A record says a session lasted 25.
• All quantities and shape descriptions are supplied in the worked example and questions; no purchase or personal information is needed.

Learn the idea

Time, mass, and liquid volume are different attributes. Minutes describe duration, grams or kilograms describe mass, and liters describe liquid volume. Choose a unit that matches the question before calculating. A number without an attribute or unit cannot clearly communicate what was measured.

Read what quantity is being described. Select the matching supplied unit and explain why the other types would answer a different question. Use a fictional example rather than estimating a personal or sensitive measurement.

Name the attribute before choosing its unit. A unit for one attribute cannot label another attribute’s result. Make three headings: Time, Mass, and Liquid Volume; match the unit choices.

1. Make three headings: Time, Mass, and Liquid Volume; match the unit choices.
2. Follow the worked example. Point to each number or shape feature and say what it tells you.
3. Read what quantity is being described.
4. Try the question and then the three practice questions. Check your answers and explain any change you make.

Check your reasoning

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Take it further

Write one fictional measurement in each category: duration, mass, liquid volume. Expected: appropriate matching units.

Nothing here is saved to an account or sent to a teacher. The answer download includes your current choice and any checked feedback. It does not include choices from the separate More practice section. Download that section separately.