巧算(三年级奥数题及答案)(2)
奥数网
2011-03-24 13:45:20
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
