问题 解答题
脱式计算.
①3.68×[1÷(2
1
10
-2.09)]
②[
3
4
-0÷(
1
7
+
2
13
)]×1
1
3

③1
1
5
×
3
8
+
5
8
÷
5
6

④2
1
7
+1
1
8
×
5
9
+
3
8
答案

①3.68×[1÷(2

1
10
-2.09)],

=3.68×[1÷(

1
10
-
9
100
)],

=3.68×[1÷(

10
100
-
9
100
)],

=3.68×[1÷

1
100
],

=3.68×100,

=368;

②[

3
4
-0÷(
1
7
+
2
13
)]×1
1
3

=[

3
4
-0]×
4
3

=

3
4
×
4
3

=1;

③1

1
5
×
3
8
+
5
8
÷
5
6

=

6
5
×
3
8
+
5
8
×
6
5

=

6
5
×(
3
8
+
5
8
),

=

6
5
×1,

=1

1
5

④2

1
7
+1
1
8
×
5
9
+
3
8

=2

1
7
+
9
8
×
5
9
+
3
8

=2

1
7
+(
5
8
+
3
8
),

=2

1
7
+1,

=3

1
7

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