300030,300030股吧 (30003030相邻的整十万数)
求教数学一题1、解:设苏源原来有x本书,则孙浩原来有4/5x本书。4/5x-10=7/10(x-10)8x-100=7x-70 x=100-70 x=30 4/5X30=24 苏源原来有30本书,孙浩原来有24本书...
求教数学一题1、解:设苏源原来有x本书,则孙浩原来有4/5x本书。4/5x-10=7/10(x-10)8x-100=7x-70 x=100-70 x=30 4/5X30=24 苏源原来有30本书,孙浩原来有24本书...