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The answer to the first question on page 34 in the first volume of the fifth grade math book.
Answer 1: 1.2 ÷ 3 = 0.4 (hectare) (how many hectares are irrigated by two pumps in one hour)

0.4 ÷ 2 = 0.2 (hectare) (how many hectares are irrigated by a water pump in one hour)

Answer: 1 pump can irrigate 0.2 hectares per hour.

Answer 2: 1.2 ÷ 2 = 0.6 (hectares) (how many hectares are irrigated by a water pump in two hours)

0.6 ÷ 3 = 0.2 (hectare) (how many hectares are irrigated by a water pump in one hour)

Answer: 1 pump can irrigate 0.2 hectares per hour.

This is the People's Education Edition. I don't know the rest.

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