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简便算法99 54 54

54*99+54=54x(99+1)=54x100=5400

99*54+54=99*54+1*54=(99+1)*54=100*54=5400

54*99简便方法计算54*99=54*(100-1)=54*100-54*1=5400-54=5346

54*99=54*(100-1)=54*100-54*1=5400-54=5346

54+99x99+45 =99x99+(54+45) =99x99+99 =99(99+1) =99x100 =9900

45加99乘99加54=(45+54)+99*99=99*(1+99)=99*100=9900

=54x(100-1)=54x100-54=5346

54+99*99+54=54x2+99x(100-1)=9900-99+108=9900+(108-99)=9900+9=9909

54+99*99+54=54*2+100*99-1*99=108-9900-99=9900+9=9909

54*99这题用简便方法怎么算,要试子.答案.54*99=54*(100-1)=54*100-54*1=5400-54=5446

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