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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

=37+25×40-25×3 =37+1000-75 =1000-38 =962

(56+44)X37=3700 25X40十+25x4=1100

原式 =(75+25)x37 =100x37 =370 供参考。

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

125X37X25 =125×25×(36+1) =125×25×36+125×25 =125×25×4×9+125×(24+1) =12500×(10-1)+125×8×3+125 =125000-12500+3000+125 =128000-12500+125 =115500+125 =115625

=75×(37+63) =75×100 =7500

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

864*37*27 =864*999 =864*(1000-1) =864000-864 =863136

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