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Sagot :

Bonjour,

Exercice 3:

A = - 140000 - 250000 + 120000 -360000 + 130000

= - 750000 + 250000

= - 500000

B = 9 + 8,4 + 1,7 - 1,9 + 8,3 - 6,5

= 27,4 - 8,4

= 19

C = 1 - ( - 1 - ( - 1 - ( - 1 - 1)))

= 1 - ( - 1 - ( - 1 - ( - 2)))

= 1 - ( - 1 - ( - 1 + 2))

= 1 - ( - 1 - 1)

= 1 - ( - 2)

= 1 + 2

= 3

D = 3,5 + 11,2 - ( - 30 + 50) - ( - 5,3)

= 3,5 + 11,2 - 20 + 5,3

= 0

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