试题:
递等式计算(怎样简便就怎么计算)
1
3
÷(
2
3
-
2
5

1
3
×
3
4
÷(
3
4
-
5
12

6
7
×
6
5
-
6
7
÷5
3
10
-
3
10
÷6
36
48
49
×
1
4

7
4
÷(
2
3
+
1
2
)×
4
5

答案:

我来补答
(1)
1
3
÷(
2
3
-
2
5

=
1
3
÷
4
15

=1
1
4


(2)
1
3
×
3
4
÷(
3
4
-
5
12

=
1
3
×
3
4
÷
1
3

=
1
4
÷
1
3

=
3
4


(3)
6
7
×
6
5
-
6
7
÷5
=(
6
5
-
1
5
)×
6
7

=1×
6
7

=
6
7


(4)6÷
3
10
-
3
10
÷6
=20-1.8
=18.2;

(5)36
48
49
×
1
4

=36×
1
4
+
48
49
×
1
4

=9+
12
49

=9
12
49


(6)
7
4
÷(
2
3
+
1
2
)×
4
5

=
7
4
÷
7
6
×
4
5

=
3
2
×
4
5

=1
1
5
 
 
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