Table: Monthly electricity use of an office, in kWh — January 1,200; February 1,000; March 1,500; April 1,800. What was the total use from January to April?

Correct answer: C. 5,500 kWh

Total = 1,200 + 1,000 + 1,500 + 1,800 = 5,500 kWh. Pair 1,200 + 1,800 = 3,000 and 1,000 + 1,500 = 2,500 for a quick sum.

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Answer and explanation

The correct answer is C. 5,500 kWh

Total = 1,200 + 1,000 + 1,500 + 1,800 = 5,500 kWh. Pair 1,200 + 1,800 = 3,000 and 1,000 + 1,500 = 2,500 for a quick sum.