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Exercice : Calculer les expressions suivantes

 A = −27+12−( −4) + (−55) +5 B =10,2+( −33) − (+4,7) +8,9+ (−7,8) − (−10,5) C = −101+23,7+ (−42,8) + (−32,9) +74,2

Sagot :

WINNER123

A = -27+12+4-55+5 = 21-82 = - 61

 

B = 10.2-33-4.7+8.9-7.8 +10.5 = 29.6 - 45.5 = 15.9

 

C = -101 +23.7 -42.8 -32.9 +74.2 = 97.9 - 176.7 = - 78.8

JOKER

A = -27+12+4-55+5 = 21-82 = - 61

B = 10.2-33-4.7+8.9-7.8 +10.5 = 29.6 - 45.5 = 15.9

C = -101 +23.7 -42.8 -32.9 +74.2 = 97.9 - 176.7 = - 78.8

 

bon courage !!