Sagot :
Bonjour,
-9/5 + 6/5= - 3/5
11/9 - 5/9= 6/9 = (3 x 2) / (3 x 3) = 2/3
-7/8 + 5/8= - 2/8 = (2 x - 1) / (2 x 4) = - 1/4.
19/20 - 7/20 - -3/20= 19/20 - 7/20 + 3/20 = 22/20 - 7/20 = 15/20 = (5 x 3) / (5 x 4) = 3/4.
Réponse :
Explications étape par étape
Bjr,
-9/5 + 6/5= -3/5
11/9 - 5/9= 6/9 = 2/3
-7/8 + 5/8= -2/8 = -1/4
Si 19/20 - 7/20 - (-3/20) = 15/20 = 3/4
Si 19/20 - 7/20 -3/20 = 9/20