Alice has $12.50, which is less than Bob's $15.20. Compare the dollar amounts first — $12 < $15.
PRIMARY 2 · MATHEMATICS
Money
Top 5 mistakes
Ranked by how often they appear across 45 MOE-aligned practice questions in our archive.
David has $15.02, which is close to Bob's $15.20 in dollars. Compare the cents: 20¢ > 02¢, so Bob has more.
Charlie has $12.05, the smallest amount. Possibly confused 'most' with 'least'.
Correctly calculated the fifty-cent coins ($1.50) but took only one twenty-cent coin ($0.20) and ignored the two ten-cent coins altogether, giving $1.50 + $0.20 = $1.70.
Counted only 3 twenty-cent coins instead of 4, giving 3 × $0.20 = $0.60 instead of $0.80. Then added $1.50 + $0.60 + $0.20 = $2.30. Made an off-by-one error when counting the twenty-cent coins.
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