So, -10 + 50 = 40. -9 + 49 = 40. -8 + 48 = 40. Seeing a pattern?
If you include -10 and 50, you have 61 integers to add, which makes 30 pairs that add to 40 for 1200 total plus the median, (50 - 10)/2 = 20 for a total of 1220.
Rudy O.
asked • 04/30/20Find the sum of the integers from -10 to 50 inclusively
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