Je n arrive à calculer ces fractions A) -12/-5-8 B) 2/-5+-2/15-7/12
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Question
Je n arrive à calculer ces fractions
A) -12/-5-8
B) 2/-5+-2/15-7/12
A) -12/-5-8
B) 2/-5+-2/15-7/12
1 Réponse
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1. Réponse overjay
a)
je suppose que c'est (-12)/(-5) - 8
a= (-12)/(-5) - 8 = 12/5 - 8 = 12/5 - 8*5/5 = 12/5 - 40/5 = (12-40)/5 = -28/5 = -5.6
b)
b = 2/(-5) + -2/15 - 7/12
= -2/5 - 2/15 - 7/12 = -2*3*4/(5*3*4) - 2*4/(15*4) - 7*5/(12*5)
= -24/60 -8/60 -35/60 = (-24-8-35)/60 = -67/60 = -1.1166666...