101/102x202=101/102x(100+102)=101/102×100+101/102x102=10100/102十101=(10200-100)/102+101=10200/102-100/102+101=100+101-100/102=200+1-100/102=200+102/102-100/102=200+2/102=200+1/51=200又1/51。
101/102×202
=101/102×(204-2)
=101/102×204-101/102×2
=202-202/102
=202-1又100/102
=200又1/51
102/101*202=102/101*(101*2)=(102/101*101)*2=102*2=204