比较下面两个积的大小:A=9.5876×1.23456,B=9.5875×1.23457,则A______B.

5个回答

  • 解题思路:可用两数作差的方法进行比较大小,在计算时,可将算式9.5876×1.23456可改写成9.5875×1.23456+0.0001×1.23456,将算式9.5875×1.23457改写成9.5875×1.23456+9.5875×0.00001,然后再根据乘法分配律进行计算比较简便,由A-B大于0,可知A>B.

    A-B

    =9.5876×1.23456-9.5875×1.23457,

    =9.5875×1.23456+0.0001×1.23456-(9.5875×1.23456+9.5875×0.00001),

    =0.0001×1.23456-0.001×0.95875,

    =0.0001×(1.23456-0.95875),

    =0.0001×0.27581,

    =0.000027581,

    0.000027581>0,

    所以:A>B.

    故答案为:>.

    点评:

    本题考点: 小数的巧算.

    考点点评: 解答此题的关键是将算式中的数字进行改写,然后再依据乘法分配律进行解答.