Question

请问 725x25x64 如何用简便方法巧算?

Answer 1

725*25*64

=725*25*4*16

=725*100*16

=（700+25）*16*100

=（25*4*7+25）*16*100

=25*（28+1）*4*4*100

=29*100*4*100

=(25+4)*4*10000

=(100+16)*10000

=1160000