能简便的用简便方法计算.600÷25÷4

1个回答

  • 解题思路:(1)根据连除的性质进行计算;

    (2)根据乘法分配律进行计算;

    (3)根据乘法交换律进行计算;

    (4)根据连减的性质进行计算;

    (5)根据乘法分配律进行计算;

    (6)根据乘法分配律进行计算.

    (1)600÷25÷4,

    =600÷(25×4),

    =600÷100,

    =6;

    (2)156×63+156×36,

    =156×(63+36),

    =156×99,

    =156×(100-1),

    =156×100-156×1,

    =15600-156,

    =15444;

    (3)40×13×0.25,

    =40×0.25×13,

    =10×13,

    =130;

    (4)14.27-9.62-4.38,

    =14.27-(9.62+4.38),

    =14.27-14,

    =0.27;

    (5)4.57×0.39+5.43×0.39,

    =(4.57+5.43)×0.39,

    =10×0.39,

    =3.9;

    (6)4.9×99+4.9,

    =4.9×(99+1),

    =4.9×100,

    =490.

    点评:

    本题考点: 小数四则混合运算;整数四则混合运算;运算定律与简便运算.

    考点点评: 完成本题要注意分析式中数据,运用合适的简便方法计算.