问题 解答题
递等式计算.
1224÷36×25-758132.5-18÷7.5+7.612-
2
7
+
1
7
÷
1
5
[
3
4
-(
7
16
-
1
4
)]×
8
9
答案

(1)1224÷36×25-758,

=34×25-758,

=850-758,

=92;

(2)132.5-18÷7.5+7.6,

=132.5-2.4+7.6,

=130.1+7.6,

=137.7;

(3)12-

2
7
+
1
7
÷
1
5

=12-

2
7
+
5
7

=11

5
7
+
5
7

=12

3
7

(4)[

3
4
-(
7
16
-
1
4
)]×
8
9

=[

3
4
-
3
16
8
9

=

9
16
×
8
9

=

1
2

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