Back to Rates

Rates, total amounts and numbers of units topic check

Practise rates, total amounts and numbers of units in Primary 5 Mathematics, check independently, and return later to review. This check covers selected skills, not the whole course topic.

Learning goals
  • Calculate an amount per unit with its correctly oriented unit
  • Calculate a total amount from a constant rate and number of units
  • Calculate the number of units from a total amount and nonzero rate
  • MOE teaching syllabus · Primary 5 Mathematics (taught from 2025)
Start · Practise · Check · Review

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Check again

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Retention check

Come back later to see whether your learning has lasted.

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Revision notes

Revise rates

Use per-unit rates to connect two quantities, calculate a missing amount and check the units in your answer.

Key ideas

  1. Rates and unit amounts

    Use a per-unit amount to connect two different quantities and check the units.

  2. Choose the quantities before using a rate

    Separate a running total, fixed fee, shared output or idle time before using the rate relationship.

What the syllabus asks

From the Primary 5 Mathematics 2025 syllabus

  • Rate as the amount of a quantity per unit of another quantity
  • Finding rate, total amount or number of units given the other two quantities