Hebei Education Press Grade Five Math Exercise Book p4 1 3.

Solution: (1) The temperature regulation effect of the day and night evaporation water in one hectare of green space is equivalent to the cold air released by 500 air conditioners working continuously for 20 hours.

4820×500=24 10000 (unit)

Answer: The temperature regulation effect of 4820 hectares of green space evaporation water is equivalent to the cold air released by 24 1000 air conditioners working continuously for 20 hours.

(2) 2410000× 90× 5 =1084500000 (yuan)

A: This 4,820 hectares of green space can save people10.845 billion yuan in electricity bills every year.

There are 20 questions in the math contest. If you do one question correctly, you will get 5 points; if you do one wrong question, you will be deducted 1 point. Liu Ming got 88 points. Do you know how

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