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People's education edition, fifth grade primary school, the second volume of mathematics, 67 pages, the answer is urgent.
1， 1 ÷ 2 = 1/2kg， 1 ÷ 3 = 1/3kg。

2,3 ÷ 4 = 3/4 square meters. 3÷5=3/5 square meters

3.9 cm = 9/ 10 DM, 79 DM = 79/ 10 m, 30 cm = 30/ 100 m, 56 cm2 =56/ 100 square decimeter, 133 cubic meter.

4、 1÷8 1= 1/8 1

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