问题 解答题
怎样算简便就怎样算.
1
8
×
7
11
+
4
11
×
1
8
2
3
+
7
6
×
3
14
18
7
-
1
2
÷
3
4
-
1
3
45×(
1
5
+
1
3
7
9
-
7
9
÷7
2
3
÷[
9
14
×(
5
6
-
4
9
)].
答案

(1)

1
8
×
7
11
+
4
11
×
1
8

=(

7
11
+
4
11
)×
1
8

=1×

1
8

=

1
8

(2)

2
3
+
7
6
×
3
14

=

2
3
+
1
4

=

8
12
+
3
12

=

11
12

(3)

18
7
-
1
2
÷
3
4
-
1
3

=

18
7
-
2
3
-
1
3

=

18
7
-(
2
3
+
1
3
),

=

18
7
-1,

=

11
7

(4)45×(

1
5
+
1
3
),

=45×

1
5
+45×
1
3

=9+15,

=24;

(5)7÷

7
9
-
7
9
÷7,

=7×

9
7
-
7
9
×
1
7

=9-

1
9

=8

8
9

(6)

2
3
÷[
9
14
×(
5
6
-
4
9
)],

=

2
3
÷[
9
14
×
7
18
],

=

2
3
×4,

=

8
3

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