7.6+3.9÷0.3(14.7+5.6)÷762.7÷8÷1.254.6÷0.08-20.8.

1个回答

  • 解题思路:(1)先算除法,再算加法;

    (2)先算括号里的,再算除法;

    (3)根据除法的性质:连续除以两个数,等于除以这两个数的积;

    (4)先算除法,再算减法;据此依次解答.

    7.6+3.9÷0.3,

    =7.6+1.3,

    =8.9;

    (14.7+5.6)÷7,

    =20.3÷7,

    =2.9;

    62.7÷8÷1.25,

    =62.7÷(8×1.25),

    =62.7÷10,

    =6.27;

    4.6÷0.08-20.8,

    =57.5-20.8,

    =36.7;

    故答案为:20.6,2.9,6.27,36.7.

    点评:

    本题考点: 小数四则混合运算;运算定律与简便运算.

    考点点评: 根据题意,先找清运算顺序,然后再进一步计算即可;能简算的要简算.