4*0.6+0.6/0.25
=4*0.6+0.6*4
=4*(0.6+0.6)
=4*1.2
=4.8
11分之16-0.87+11分之6-1.13
=(16/11+16/11)-(0.87+1.13)
=2又10/11-2
=10/11