问题 解答题
用递等式计算
0.36×11
4
7
+13
3
7
÷
7
9

18
5
9
-(7
5
13
-2
1
3
)-
8
13
÷
1
2

0.56÷[(3.6×
5
12
-1.5)×4.4+5.6].
答案

(1)0.36×11

4
7
+13
3
7
÷
7
9

=

9
25
×
81
7
+
94
7
×
9
7

=

729
175
+
846
49

5103
1225
+
21150
1225

=

26253
1225

=21

528
1225

(2)18

5
9
-(7
5
13
-2
1
3
)-
8
13
÷
1
2

=18

5
9
-5
2
39
-
8
13
×
2,

=18

5
9
-5
2
39
-
16
13

=18

65
117
-5
6
117
-
144
117

=12

32
117

(3)0.56÷[(3.6×

5
12
-1.5)×4.4+5.6],

=0.56÷[(1.5-1.5)×4.4+5.6],

=0.56÷[0×4.4+5.6],

=0.56÷5.6,

=0.1.

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