Question

Calculati :
( - 2 ) + ( -3 ) + ( + 1 ) + ( + 4 ) =
5 10 2 15

2 + ( - 1 ) + ( + 5 ) + (- 13 )
7 14 6 42

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Answer 1

Răspuns:

$( - 2) + ( - 3) + ( + 1) + ( + 4) = 0 \\ \\ \\ \\ \\ \\ 2 + ( - 1) + ( + 5) + ( - 13) = - 7$