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.