PRIMARY 3 · MATHEMATICS

Fractions
Top 5 mistakes

Ranked by how often they appear across 83 MOE-aligned practice questions in our archive.

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#1Misconception

Added separately.

Seen in 4 questions

#2Partial logic

Not simplified.

Seen in 3 questions

#3Misconception

Subtracted separately.

Seen in 3 questions

#4Calculation error

Calculation error.

Seen in 2 questions

#5Misconception

Found the common denominator 8 correctly but forgot to convert the numerator of 1/4. Wrote 1/8 + 3/8 = 4/8 instead of 2/8 + 3/8 = 5/8. The numerator must be multiplied by the same factor as the denominator.

Seen in 1 question

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