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要简便运算! 125x16 = = =

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

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

(125X16)X3 =(125×8)×(2×3) =1000×6 =6000

125x16x5 =125×(8×2)×5 =(125×8)×(2×5) =1000×10 =10000

简便计算 125x16x50 =(125×8)×(2×50) =1000×100 =100000

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

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

原式 =125x16x39 =(125x8)x(2x39) =1000x78 =78000

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

0.125x16 =0.125x8x2 =1x2 =2

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