1999999+199999+19999+1999+199+19用巧算算怎么算?
问题描述:
1999999+199999+19999+1999+199+19用巧算算怎么算?
答
(2000000+200000+20000+2000+200+20)-6=2222220-6=2222214
1999999+199999+19999+1999+199+19用巧算算怎么算?
(2000000+200000+20000+2000+200+20)-6=2222220-6=2222214