Question

find the sum ( - 7 ) + ( 8 ) + ( - 27 ) + 27​

Answer 1

Answer:

$( - 7) + (8) + ( - 27) + (27) \\ = ( - 7) + (8) - 27 + 27 \\ = ( - 7) +(8) + 0 \\ = 1$

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Answer 2

Answer:

$\tt(- 7 - 27) + (8 + 27) \\ \rightarrow \tt( - 34) + (35) \\ \tt \rightarrow \: (35 - 34) { (- \: + = -) } \\ \tt \rightarrow \: 1$