问题 解答题
下面各题怎样算简便就怎样算.
12÷(
1
3
+
3
4
5
9
÷
1
26
+
4
9
×26
9
17
×(51+
17
27
)-
17
27
(2-
9
10
÷
3
5
)÷
5
6
1
6
7
-
1
3
÷
7
12
-
2
7
1
2
×6+
5
6
÷
2
7
)÷
1
10
答案

(1)12÷(

1
3
+
3
4

=12÷

13
12

=11

1
13

(2)

5
9
÷
1
26
+
4
9
×26

=(

5
9
+
4
9
)×26

=1×26

=26;

(3)

9
17
×(51+
17
27
)-
17
27

=

9
17
×51+
9
17
×
17
27
-
17
27

=27+

1
3
-
17
27

=27

1
3
-
17
27

=26

8
27

(4)(2-

9
10
÷
3
5
)÷
5
6

=(2-1

1
2
)÷
5
6

=

1
2
÷
5
6

=

3
5

(5)1

6
7
-
1
3
÷
7
12
-
2
7

=1

6
7
-(
4
7
+
2
7

=1

6
7
-
6
7

=1;

(6)(

1
2
×6+
5
6
÷
2
7
)÷
1
10

=(3+2

11
12
)÷
1
10

=5

11
12
÷
1
10

=59

1
6

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