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Sagot :

Bonsoir,

+(-27) +(+35) + (+20) +(+17)=

(+35+20+17) +(-27) =45

(+3,1) +(-3,5) + (-7,8) +(-1,6) =

(+3,1) + ( -12,9 ) = -9,8

+( -16,1) + (-4,25) + (+7,65) + (-1,6) =

+(+7,65)  +  (-16,1) + (-4,25) + (-1,6) = -14,3

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