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简便计算(125x99十125)x16

简便计算(125x99十125)x16 =125x8x2x(99+1) =2000x100 =200000

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

125×(99+1)

(125X99十125)X16 =125X(99十1)X16 =125X100X16 =(125X8)X(100X2) =1000X200 =200000

=(99+1)×125×16 =100×125×16 =200000

(125X99十125)X16 =125X(99+1)X8X2 =1000X100X2 =200000

125×99-125×91 =125×(99-91) =125×8 =1000

125X99 =125X100-125X1 =12500-125 =12375

125X99=125X100-125

125x56x99的简便运算 =(125×8)×(7×100-7) =1000×(700-7) =1000×700-1000×7 =700000-7000 =693000

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