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50x125x16用简便方法计算

125x16 =125x(2x8) =(125X8)x2 =1000x2 =2000

=329×125×8×2 =329×2×125×8 =658×1000 =658000

25 x 125 x 16 = 25 x 125 x 2 x 8 = (25 x 2) x ( 125 x 8) = 50 x 1000 = 50000

125x16x25 =(125×8)×(2×25) =1000×50 =50000

125×35×16 =125×35×4×4 =500×140 =70000

连乘最常用的简单算法就是凑零,也就是凑整百。 可以拆成125X4X250X4X4X6,=500X1000X24=5X24X100X1000 这样就好算了,记住一些乘出来可以凑成整百的就好。 25X4=100 125X4=500 125X8=1000 差不多就这些

0.125x16 =0.125x8x2 =1x2 =2

125x15x16 =125x15x8x2 =(125x8)x(15x2) =1000x30 =30000

第一道题 (125X99+125)X16 =125X(99+1)X16 =25X5X4X4X100 =100X20X100 =200000 第二道题 5X999+5+99X7+7+3X9+3+9 =5X(999+1)+7X(99+1)+3X(9+1)+9 =5000+700+30+9 =5739

(125Ⅹ22十125)x16用简便方法计算 (125Ⅹ22十125)x16 =125*(22+1)*16 =125*8*(2*23) =46*1000 =46000

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