168
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45 + 78 = 123
a - 45 = -78 +45 +45 = -123 a= -123
123+45-67+8-9
84 + 39 = 123 84- 39 = 45 84 + 39 = 123 84- 39 = 45
You can find the average of a series of numbers by simply adding the numbers together and divide your total by the amount of numbers added. 16 + 23 + 39 + 45 = 123 123 ÷ 4 = 30.75