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25 December, 12:05

First 100 units 24p per unit

Remaining units 16p

Mrs watt checks her electricity bill here are her meter readings.

New reading: 7143

Old reading: 6997

A) Use subtraction to calculate the number of units used

B) Calculate the cost of the number of units used

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Answers (1)
  1. 25 December, 12:32
    0
    Answer: a) 146 units used b) the cost of the number of units used is 3136 p.
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