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Term 1 · Weeks 6–9 · Units and Conversion

Basic problem

Basic

Which metric unit is most appropriate for the mass of a sack of rice?

Choices
Show step-by-step solution

Answer: c. kilogram

  1. A sack of rice has a mass of about 25 to 50 kg.
  2. Grams would give numbers in the tens of thousands; tonnes would give tiny decimals. Kilogram is the appropriate unit.

Common errors to watch for

  • (b) Grams suit small items like a pack of candy.
  • (d) A tonne is 1000 kg, far heavier than one sack.

Budget of Work competencies

  • gm11.t1.w6.c1
    Determine and apply the appropriate metric units for various contexts, such as units for small and large quantities and scientific measurements.

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