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Fifth grade, the second volume of mathematics supplementary exercises, 38 pages of answers.
First of all, 2 ÷ 5 = 2/5 (hectare) (two fifths).

2/5× 3 = 6/5 (hectares) (six fifths) or 1 1/5 hectares (one fifth).

Each serving is 2/5 (ha), and Chinese cabbage accounts for 1 1/5 ha.

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