1.7/8除以56.34-87.5除以5634(要过程)

问题描述:

1.7/8除以56.34-87.5除以5634(要过程)
2.12.8除以{[3有1/5X(5-2.8除以14/15)]+(26/5-13X0.4)}

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=02.12.8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)}=...