题目内容

口算．
1
3
×（15+
6
7
）=		 48×（
1
4
-
1
6
）=		 32.6÷100=
1
5
-
1
5
÷5=
（
1
5
-
1
6
）×30=		 9.1÷0.07=
2
5
×
3
5
×2=		 1-0.5%=
分析：本题直接根据运算法则进行计算．
解答：解：
1
3
×（15+
6
7
）=5
2
14
          48×（
1
4
-
1
6
）=4                 32.6÷100=0.326                 
1
5
-
1
5
÷5=
4
25

（
1
5
-
1
6
）×30=1                 9.1÷0.07=130                  
2
5
×
3
5
×2=
12
25
                   1-0.5%=99.5%
点评：本题可根据运算法则直接运算，有的题目可以应用乘法分配律进行简算，注意看清运算顺序和运算符号．
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