1.25×67.875+125×6.7875+1250×0.053375.

1个回答

  • 解题思路:先把1.25×67.875和1250×0.053375变成125×0.67875和125×0.53375所以1.25×67.875+125×6.7875+1250×0.053375=125×0.67875+125×6.7875+125×0.53375=125×(0.67875+6.7875+0.53375)=125×8=1000.

    1.25×67.875+125×6.7875+1250×0.053375,

    =125×0.67875+125×6.7875+125×0.53375,

    =125×(0.67875+6.7875+0.53375),

    =125×8,

    =1000.

    点评:

    本题考点: 四则混合运算中的巧算.

    考点点评: 解答此题的关键是把1.25×67.875和1250×0.053375变成125×0.67875和125×0.53375,再利用乘法的分配律计算.