如题所述
第1个回答 2013-10-02
=7.69x(100+1)
=7.69x100+7.69x1
=769+7.69
=776.69追问
=7.69x100+7.69x1
=769+7.69
=776.69追问
再请问4.65x32+2.5x46.5+0.465x430怎么用简便方法算
追答=4.65x32+25x4.65+4.65x43
=4.65x(32+25+43)
=4.65x100
=465