问题 解答题
计算(能简算的要简算)
1
5
÷(
2
3
+
1
5
)×13
1
4
-
2
9
)×36
1
15
×(
1
3
-
1
12
5
18
×
1
4
÷
10
9
[1-(
1
4
+
3
8
)]÷
1
4
7
9
÷
11
6
+
2
9
×
6
11
答案

(1)

1
5
÷(
2
3
+
1
5
)×13,

=

1
5
÷
13
15
×13,

=

1
5
×(
15
13
×13),

=

1
5
×15,

=3;

(2)(

1
4
-
2
9
)×36,

=

1
4
×36-
2
9
×36,

=9-8,

=1;

(3)

1
15
×(
1
3
-
1
12
),

=

1
15
×
1
4

=

1
60

(4)

5
18
×
1
4
÷
10
9

=

5
18
×
1
4
×
9
10

=

5
18
×
9
10
×
1
4

=

1
4
×
1
4

=

1
16

(5)[1-(

1
4
+
3
8
)]÷
1
4

=[1-

5
8
1
4

=

3
8
×4,

=

3
2

(6)

7
9
÷
11
6
+
2
9
×
6
11

=

7
9
×
6
11
+
2
9
×
6
11

=(

7
9
+
2
9
)×
6
11

=1×

6
11

=

6
11

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