Sagot :
Bjr,
4/3 - 2/3 * 5/8 = 4/3 - 10/24 = 32/24 - 10/24 = 12/24 = 1/2.
5/18 * (6/15 + 4/15) = 5/18 * 10/15 = 50/90 = 5/9.
5/2 : (7/5 + 9/2) = 5/2 : (14/10 + 45/10) = 5/2 * 10/59 = 50/118 = 25/59
A=4/3-2/3*5/8
A=4/3-2*5/3*8
A=4/3-10/24
A=4*8/3*8-10/24
A=32/24-10/24
A=(22/24)/2
A=11/12