Mathematics
Rate
The most common mistakes Singapore primary students make in Rate, distilled from 37+ MOE-aligned questions across P5. Free practice at every level.
Top 5 mistakes in Rate
- #1Calc error
Used 2.25 × 24 = 54, treating the time as 2.25 minutes instead of 2.25 hours.
- #2Calc error
Used 24 × 10 = 240, treating the time as 10 minutes.
- #3Calc error
Converted 2 hours 15 minutes to 225 minutes instead of 135: 225 × 24 = 5400.
- #4Calc error
Solved 0.45c = 14.40 - 4, then divided by 0.40 incorrectly (got 30 by rounding the result).
- #5Misconception
Assumed all 80 pages were colour, then subtracted (14.40 / 0.45 = 32) without accounting for the cheaper black-and-white pages.
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- Primary 537 questions
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