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Question

Find the sum of -1123+-17+840


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Solution

The Associative Property of Addition of Integers: The sum of three or more integers does not depend on the way they are grouped, or if, a,b,c are three integers, then a+b+c=a+b+c

Using the associative property, we get:

-1123+-17+840=-1123+-17+840

=-1140+840

=-300 (Here…1140>840.So, we shall subtract 840 from 1140 and will use the sign of 1140)

Therefore, the sum is -300


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