巧算(三年级奥数题及答案)(2)
学而思奥数网(原创)
2010-11-25 16:15:05
解答:①式=4723-723-189
=4000-189=3811
②式=2356-256-159
=2100-159
=1941

解答:①式=4723-723-189
=4000-189=3811
②式=2356-256-159
=2100-159
=1941
