VIVIAN-ZJ 2007-11-4 17:38
数学题
需要巧算
333387.5×79＋790×66661.25
谢谢.
钱小猪 2007-11-4 19:02
[size=5]333387.5×79＋790×66661.25
=33338.75*790+790*66661.25
=(33338.75+66661.25)*790
=100000*790
=79000000[/size].
VIVIAN-ZJ 2007-11-4 21:32
:handshake :handshake 小猪.
VIVIAN-ZJ 2007-11-4 21:36
:handshake :handshake 小猪.