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要简便运算! 125x16 = = =

原式 =125x(8x2) =(125x8)x2 =1000x2 =2000 供参考。

=125×8×(2×4) =1000×8 =8000

对的 125*16=125*(8*2) 125*16=125*16

如图

(125―45)x3 =125x3―45x3 =375―135 =240

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

125X50x16 =125x50x8x2 =(125x8)x(50x2) =1000x100 =100000 行家正解,不明白可以追问!祝您学习进步 满意请点击下面的【选为满意回答】按钮,O(∩_∩)O谢谢

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

你好!简便算法是: (125X99+125)X16 =[125X(99+1))]X16 =[125X100]X16 =12500X16 =200000

125x16x6x25 =(125×8)×(2×2×25)×3 =1000×100×3 =300000

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