第1个回答 2009-06-24
197*97/98+91/98
=197*97/98+97/98-6/98
=198*97/98-6/98
=9600/49
第2个回答 2009-06-24
(197*97+91)/98=195.91836734693877551
第3个回答 2009-06-24
197*97/98+91/98
=197*(1-97/98)+91/98
=197-197/98+91/98
=197-106/98
=(98*197-106)/98
=19200/98
=9600/49