2.73/9.1=0.3
22.3/9
=(18+4.3)/9
=2+43/90
=2又43/90
22.3/99
=(19.8+0.5)/99
=39.6/198+1/198
=40.6/198 .
2.73/9.1简便计算还有22.3/9和22.3/99,简便计算
2.73/9.1=0.3
22.3/9
=(18+4.3)/9
=2+43/90
=2又43/90
22.3/99
=(19.8+0.5)/99
=39.6/198+1/198
=40.6/198 .