Sagot :
Bonjour,
a)
4/7 -9/7 = -5/7
b)
8/5 -11/5 = -3/5
-11/7 +5/7 = -6/7
-3/4+ (-5/4) = -8/4 = -2
Bonjour
Réponse :
a. quatre septièmes = 4/7 ; moins neuf septième = -9/7
4/7-9/7 = -5/7
b. 8/5-11/5 = 8-11/5 = -3/5
-11/7+5/7 = -11+5/7 = -6/7
-3/4+(-5/4) = -3/4-5/4 = -3-5/4 = -8/4
Bonne journée :)