Question

1.7/8除以56.34-87.5除以5634（要过程）

Answer 1

1.7/8除以56.34-87.5除以5634

=7/8/(56.34)-87.5/5634

=7/8*100/5634-87.5/5634

=1/5634*(700/8-87.5)

=1/5634*0

=0

2.12.8除以｛[3有1/5X（5-2.8除以14/15）]+（26/5-13X0.4）｝

=12.8/{[16/5*(5-2.8/14/15)]+(26/5-5.2)}

=12.8/{[16-(16*2.8)/(5*210)+0}

=12.8/{16-6.4/150}

=12.8/2393.6/150

=12.8/359040

=1/28050 .