Zhejiang junior high school mathematics examination paper

(1) 0.53 * 50+(130-50) * (0.53+0.03) = 60.1(yuan)

(2) 40W21.20 yuan; Such as 100 watt is 54.50 yuan; 250 watts 142.00 yuan.

(3) Because 50 kWh is 26.50 Yuan and 200 kWh 1 10.50 Yuan, the electricity charge of 96.50 Yuan is below 200 watts and above 50 watts. If the electricity consumption is (50+X) watts, then 50*0.53+0.56X=96.50, x.

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