解题思路:(1)按整数四则混合运算的顺序计算;
(2)按小数四则混合运算的顺序计算;
(3)利用乘法的分配律计算;
(4)(5)(6)按分数四则混合运算的顺序计算.
(1)6760÷13+17×25,
=520+425,
=945;
(2)4.82-5.2÷0.8×0.6,
=4.82-6.5×0.6,
=4.82-3.9,
=0.92;
(3)(
7
12−
1
2)÷
11
24,
=([7/12]−
1
2)×[24/11],
=[7/12]×[24/11]-[1/2]×[24/11],
=[14/11]−
12
11,
=[2/11];
(4)(
1
3+
1
2)÷(2−
2
3),
=[5/6]÷1
1
3,
=[5/8];
(5)([5/6]−
5
8×[4/5])÷
1
3,
=([5/6]−
1
2)÷
1
3,
=[1/3]÷
1
3,
=1;
(6)
8
15×[
5
6÷(
7
9−
1
3)],
=
点评:
本题考点: 分数的四则混合运算;整数四则混合运算;小数四则混合运算.
考点点评: 此题考查了乘法的分配律和按整数、小数、分数的四则混合运算的顺序计算.