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37x25怎样巧算

(40-3)×25 =40×25-3×25 =1000-75 =925

﹙25×37+63×25﹚×8 =﹙37+63﹚×﹙25×4﹚×2 =100×100×2 =20000

33x25 一25 =(33-1)×25 =32×25 =8×4×25 =8×(4×25) =8×100 =800

950

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

125x50x25x64 =25x5x25x2x25x4x4x4 =(25x4)x(25x4)x(25x4)x(2x5) =100x100x100x10 =10000000

解:采用拆分法和结合律, 原式=4x12x25 =12x100 =1200

300÷125*25=300÷(125/25)=300÷5=60

10000÷(125x25) =10000÷(5x25x25) =10000÷5÷25÷25 =2000÷25÷25 =80÷25 =16/25

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