Bonjour,
1/2 -3/4 = 2/4 -3/4 = -1/4
(-1/4) / (-5/2)
= -1/4 * -2/5
= 2/20 = 1/10
1+1/2 = 2/2+1/2 = 3/2
2/(3/2) = 2*2/3 = 4/3
4- 4/3 = 12/3 - 4/3 = 8/3
2/(2/3) =
2* 3/2 =
6/2
= 3
