4.25×3/5+4.15÷1.2/5+60%
=2.55+2.49+0.6
=5.64
这是按你题目的顺序来算.
(4.25×3/5+4.15)÷1.2/5+60%
=6.7÷1.2/5+0.6
=4.6199999