Every month, the property management department will go to the residents' homes to check the electric meters. The difference between the reading of the electric meters and the last reading is the ligh

Every month, the property management department will go to the residents' homes to check the electric meters. The difference between the reading of the electric meters and the last reading is the lighting (degree) used during this period; Ji Xiao zhi Liang Jia suo Solution: ① The electricity charge per kilowatt-hour in Liang Xiao residential area is 0.55 yuan.

At the beginning of last month, the electricity meter in Liang Xiao showed a reading of 300 degrees.

∴y=0.55(x﹣300)=0.55x﹣ 165；

(2) ∵ At the beginning of this month, the property department charged Xiaoliangjia 50.6 yuan for electricity;

∴50.6=0.55x﹣ 165； Solution: x=392,

At the beginning of this month, Xiaoming's household electricity meter read 392.

The electricity consumption of Xiaoming's home last month was: 392-300 = 92 degrees.

∴92÷30≈3 degree,

It is estimated that Xiaoming's family used an average of 3 degrees of electricity every day last month.