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The speed of the first question of the first grade mathematics synchronous exercise is the first! ! !
First of all, ask how many kilowatt hours are used for daily necessities.

1 day:1156-1152 = 4.

No.2:1159-1156 = 3

No.3:1163-1159 = 4

No.4:1165-1163 = 2

No.5:1172-1165 = 7

Therefore, the average daily electricity consumption is (4+3+4+2+7)/5=4.

July is 3 1 day, so the total electricity consumption is 4 * * * 3 1 = 124.

The power saving rate is (132-124)/132 = 6.06%.

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