16分之15×(6分之5+2分之1）+4分之3 3.3×4分之1＋0.25×6又10

15/16*(5/6+1/2)+3/4
=15/16*(5/6+3/6)+3/4
=15/16*8/6+3/4
=15/2*1/6+3/4
=5/2*1/2+3/4
=5/4+3/4
=2
3.3*1/4+0.25*(6+7/10)
=3.3*0.25+0.25*6.7
=0.25*(3.3+6.7)
=0.25*10
=2.5