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25x37+25x63的简便运算

25x37+25x63的简便运算 =25x(37+63) =25x100 =2500

25x37 =25x36 +25 =(25x4)x9 +25 =100x9+25 =900+25 =925

25×37-25×33 =25×(37-33) =25×4 =100

用简便方法计算25x0.37+0.63x2.45 25x0.37+0.63x2.45 =9.25+1.5435 =10.7935 直接计算

原式 =(75+25)x37 =100x37 =370 供参考。

=75×(37+63) =75×100 =7500

946x37+48x63 =946x(30+7)+48x(60+3) =(946x30+946x7)+(48x60+48x3) =(28380+6622)+(2880+144) =35002+3024 =38026

65x37x125-37x25x54=37x(25x65x5-25x54)=37x25x(65x5-54)=37x25x(325-54)=37x25x271=250675

17/25x13/37+12/25x17/37 =17/25x13/37+17/25×12/37 =17/25x(13/37+12/37) =17/25x25/37 =17/37

37x46+37x53+37 =37x(46+53+1) =37x100 =3700

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