Sagot :
A= 1/2-5/2*1/5
=1/2-1/2
=0
B= 5/6+2/3-1/4*5/3-1/6
=5/6+4/6-5/12-2/12
=9/6-7/12
=18/12-7/12
=11/12
=1/2-1/2
=0
B= 5/6+2/3-1/4*5/3-1/6
=5/6+4/6-5/12-2/12
=9/6-7/12
=18/12-7/12
=11/12