Bonjour,
a)
3-2/3 = 9/3 -2/3 = 7/3
4/3*7 = 28/3
(7/3)/ (28/3) = 7/3 * 3/28 = 7/28 = 1/4
b)
(2/3)/ (5/6) = 2/3 * 6/5 = 12/15 = 4/5
4/5 - 2/5 =2/5
c)
-3/4 +1/2 = -3/4 + 2/4 = -1/4
2/5 -5/2 = 4/10 - 25/10 = -21/10
(2/5) / ( -21/10) = 2/5 * (-10/21) = -20/105 = -4/21
