Confused 1/2 of 2/3 with 1/2 × 1/3.
PRIMARY 5 · MATHEMATICS
Fractions
Top 5 mistakes
Ranked by how often they appear across 36 MOE-aligned practice questions in our archive.
Added across.
Added with common denominator; 'of' means multiply.
Multiplied 2 × 4 = 8 then subtracted 1 instead of adding.
Forgot to add the numerator 1.
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