脱式计算.1、99*8分之5-0.625*68+6.25*0.1

问题描述:

脱式计算.1、99*8分之5-0.625*68+6.25*0.1

脱式计算.
1、99*8分之5-0.625*68+6.25*0.1
解,得:
==99*(5/8)-(5/8)*68+(5/8)
==(5/8)(99-68+1)
==(5/8)*3
==0.625*10*3
==6.25*3
==18.75