Xiaohong's electricity consumption this month is 80 kwh, and the electricity fee is 46.4 yuan, a yuan per kilowatt hour Xiaohong's electricity consumption this month is 80 kilowatt hours, and the electricity fee is 46.4 yuan, a yuan per kilowatt hour,

Xiaohong's electricity consumption this month is 80 kwh, and the electricity fee is 46.4 yuan, a yuan per kilowatt hour Xiaohong's electricity consumption this month is 80 kilowatt hours, and the electricity fee is 46.4 yuan, a yuan per kilowatt hour,

80*a=46.4
That is 80A = 46.4
A = 0.58 yuan / kWh

Master Wang's family installed a time-sharing electricity meter. In February, he paid a total of 74.01 yuan for electricity. He used 110 kilowatt hours of electricity during the day and 20 kilowatt hours of electricity at night. It is known that every kilowatt hour during the day is 0.61 yuan. How much is the nighttime kilowatt hour?

Hello
110x0.61 = 67.1 yuan
74.1-67.1 = 7 yuan
7 divided by 20 = 7 / 20 yuan

Xiaohong's electricity consumption in May is 120 kwh, and the electricity charge is 0.52 yuan per kilowatt hour. How much is the average daily electricity charge?

（120x0.52）/31=2
It costs about 2 yuan per day

In May, we will pay 81 yuan for 135 kwh. How much is it per kWh?

Oh, I don't understand such a simple thing. It's 0.6 yuan per kilowatt hour