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Sagot :

Explications étape par étape:

a=(+3)+(−5)−(−10)+(−1)

a = 3 - 5 + 10 - 1a=3−5+10−1

a = 7a=7

b = ( - 4) - ( - 10) + ( + 3) + ( - 10)b=(−4)−(−10)+(+3)+(−10)

b = - 4 + 3b=−4+3

b = - 1b=−1

c = ( - 4.5) + ( - 1) - ( - 0.5) + ( + 5.5)c=(−4.5)+(−1)−(−0.5)+(+5.5)

c = - 4.5 - 1 + 0.5 + 5.5c=−4.5−1+0.5+5.5

c = 0.5c=0.5

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