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1600x25巧算

(40-3)×25 =40×25-3×25 =1000-75 =925

36x25-25x20+16x75 = 36x25-25x20+16x25X3 =36x25-25x20+25X48 =25X(36-20+48) =25X64 (=25X4X16)个人觉得这一步可要可不要·、 =1600

140x25 =70x2x25 =70x50 =3500

4800x25 =48x25x100 =(40+8)x25x100 =(40x25+8x25)x100 =(1000+200)x100 =120000

4x(125x25) =4×25×125 =100×125 =12500

1400/(14x25) =1400÷14÷25 =100÷25 =4

25x17+13x25一25o =25×17+25×13-25×10 =25×(17+13-10) =25×20 =500

原式=(33+11)×25 =44×25 =(40+4)×25 =40×25+4×25 =1000+100 =1100

求解…怎么巧算25X25+25X25 解: 25X25+25X25 =25×25×2 =25×50 =1250

200×25-2×25图片选D

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