35.55x1.4+(25.2-24.57)
= 49.77-24.57+25.2
=25.2+25.2
=50.4
8/15÷【8/3-（7/4+5/6）】
=8/15÷【8/3-31/12】
=8/15÷1/12
=32/5
=6.4能简便就简便，要简便的哟是的