简便运算:9又3/4-15除以19-2/19*2 (4/19*2.532+1.768*4/19)+4.3除以1又4/15

9又3/4-15除以19-2/19*2
=39/4-15/19-2/19*2
=39/4-1
=35/4
=8又4分之3
(4/19*2.532+1.768*4/19)+4.3除以1又4/15
=4/19*（2.532+1.768）+4.3÷19/15
=4/19*4.3+4.3*15/19
=4.3*(4/19+15/19)
=4.3