84*98怎么简算

问题描述:

84*98怎么简算

84*98
=84*(100-2)
=8400-168
=8232

84*(100-2)=8400-168=8232

84*98
=84*(100-2)
=84*100-84*2
=8400-168
=8232
或者
84*98
=(80+4)(100-2)
=80*100-80*2+4*100-4*2
=8000-160+400-8
=8232

84*(100-2)=8400-168=8232

=84*(100-2)
=84*100-84*2
=8400-168
=8232