Divided 480 by 12 × 10 = 120, mistakenly using 10 instead of the width 8, giving 480 ÷ 120 = 4.
PRIMARY 6 · MATHEMATICS
Volume
Top 5 mistakes
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Divided 480 by 8 × 10 = 80 instead of 8 × 12 = 96, using an incorrect factor of 10 for the length.
Divided the volume by the length only (480 ÷ 12 = 40), forgetting to also divide by the width.
Took the drop 8000 / 1000 = 8 cm and reported that as the new depth instead of the new depth = 18 - 8 = 10 cm.
Treated 8000 cm³ as filling the FULL base, but used base area 30 x 25 = 750 instead of 40 x 25 = 1000, giving a drop of 8000 / 750 = 10.67 cm; then 18 - 6 ≈ 12 cm.
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