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1.25÷2.5= 36×(
3
4
+
5
6
)=
9
9
10
÷9=
1
5
÷
1
5
×5=
8-8÷9=
4
7
÷7=
分析:(1)(3)(5)(6)根据小数、分数的除法与减法的运算法则计算即可;
(2)可根据乘法分配律计算;
(4)可根据乘法交换律计算.
解答:解:(1)1.25÷2.5=0.5;

(2)36×(
3
4
+
5
6

=36×
3
4
+36×
5
6

=27+30,
=57;

(3)9
9
10
÷9
=
99
10
×
1
9

=1
1
10


(4)5×
1
5
÷
1
5
×5
=
1
5
÷
1
5
×5×5,
=1×5×5,
=25;

(5)8-8÷9
=8-
8
9

=7
1
9


(6)
4
7
÷7=
4
49
点评:完成本题要注意分析式中数据,然后运用合适的方法计算.
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