4/9÷7/45÷0.625
=4/9*45/7÷5/8
=20/7*8/5
=32/7
(4.15-3.75)*10/1-8/5
=(4.15-3.75)*10-1.6
=0.4*10-1.6
=2.44.15-3.75乘1/10-5/8=？6/4÷45/7÷0.625=？4.15-3.75乘1/10-5/8=(4.15-3.75)*1/10-0.625=0.04-0.625=-0.5856/4÷45/7÷0.625=6/4*7/45÷5/8=6/4*8/5*7/45=12/5*7/45=84/225