9又2009分之2008乘以1449
问题描述:
9又2009分之2008乘以1449
答
9(2008/2009)*1449
=(9*2009+2008)*1449/2009
=(9*2009+2009-1)*1449/2009
=(20090-1)*1449/2009
=20089*1449/2009.
=20089*207*7/287*7
=20089*207/287