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125x79 125的简便计算

原式=125x(42-34)=125x8=1000 供参考.

原式=125x(79+21)=125x100=12500

=125*(79+9)=125*88=125*80+125*8=10000+1000=11000

9875

125X79+125 =125X(79+1) =125X80 =10000

125x79=125x(79+1)-125=10000-125=9875

=25*4*8*125*79=100*1000*79=7900000

125*(79+1)=125*80=10000

简便计算过程方法如下解:125*79=125*(80-1)=125*80-125*1=10000-125=9875

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