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78十99十78最简便方法计算

78*99+78=78x99+78x1=78x(99+1)=78x100=7800

78*99+78 =78*99+78 =78*99+79*1 =78*(99+1) =78*100 =7800

78*99+78 =(99+1)*78 =100*78 =7800

78*99+78 =78(100-1)+78 =7800-78+78 =7800 谢谢,望采纳

78* 99+78=78*(99+1)=78*100=7800

78+99*78 =78*(1+99) =78*100 =7800

78*99+78=78*100=7800所以这里可以通过简便方法的计算,得到答案是7800.

99x78+78=78x(99+1)=78x100=7800

78*99=78*(100-1)=78*100-78*1=7800-78=7722再看看别人怎么说的.

=78*(99+1)=7800

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