问题 解答题
用递等式计算(能简算的要简算).
1
2
×
4
5
÷
2
3
2
1
12
×
1
15
-4÷
2
5
13
24
×9+
11
24
÷
1
9
1
4
÷〔(
5
6
-
3
4
)×1
1
5
36×(
7
9
+
3
4
-
5
6
1
2
×
3
4
+
3
4
+1
1
2
×
3
4
答案

(1)

1
2
×
4
5
÷
2
3

=

1
2
×
4
5
×
3
2

=

3
5

(2)2

1
12
×
1
15
-4÷
2
5

=

25
12
×
1
15
-4×
5
2

=

5
36
-10,

=-9

31
36

(3)

13
24
×9+
11
24
÷
1
9

=

13
24
×9+
11
24
×9,

=(

13
24
+
11
24
)×9,

=1×9,

=9;

(4)

1
4
÷[(
5
6
-
3
4
)×1
1
5
],

=

1
4
÷[
1
12
×
6
5
],

=

1
4
÷
1
10

=

1
4
×10,

=2.5;

(5)36×(

7
9
+
3
4
-
5
6
),

=36×

7
9
+36×
3
4
-36×
5
6

=28+27-30,

=25;

(6)

1
2
×
3
4
+
3
4
+1
1
2
×
3
4

=(

1
2
+1+1
1
2
)×
3
4

=3×

3
4

=

9
4

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