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39x25简便运算

39x25怎么简便?= 39 x 100/4 = 3900 ÷ 4=(4000-100)÷ 4=4000÷4 - 100÷ 4= 1000 - 25= 975

39x25等于多少用拖式计算怎样简便怎样算=(40-1)x25=1000-25=975

25十39x25=(1十39)x25=40x25=1000

一、39x25+25x25 =(39+25)x25 =64x25 =16x(4x25) =16x100 =1600 二、39x25+25x25 =(39+25)x25 =64x25 =8x(8x25) =8x200 =1600 三、39x25+25x25 =(40-1)x25+625 =1000-25+625 =1600

39x25一25x19=25*(39-19)=25*20=500

39*25*24 =39*600=23400

(40-1)x25x2 =(40-1)x50 =(40x50-1x50) =2000-50 =1950

39*25*4=39*(25*4)=39*100=3900

可以将8拆成4X2:8X39X25=2X4X25X39=100X2X39=200X39=7800

39x25; (40-1)x25; =40x25-1x25; =1000-25; =975

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