Sagot :
A) 2/3-2/3*9/5= 2/3-18/15 = 10/15-18/15 = -8/15
B)(1/6-1/3) : (2/5*3/4) = (1/6-2/6) : (6/20) = -1/6 : 6/20 = -1/6 * 20/6 = -20/36 = - 5/9
2/3 -2/3 X 9/5 = 2/3 -18/15 = 10/15 -18/15 = -8/15
(1/6-1/3) = 1/6 - 2/6 = -1/6 X 20/6 = - 20/36 = - 10/18 = - 5/9
(2/5 X 3/4) 6/20