题目内容

脱式计算:
8
9
×[
3
4
-(
7
16
-
1
4
)]
[
1
2
-(
3
4
-
3
5
)]÷
7
10

7
9
÷
11
5
+
2
9
×
5
11
(1)
8
9
×[
3
4
-(
7
16
-
1
4
)],
=
8
9
×(
3
4
-
3
16
),
=
8
9
×
3
4
-
8
9
×
3
16

=
2
3
-
1
6

=
1
2


(2)[
1
2
-(
3
4
-
3
5
)]÷
7
10

=(
1
2
-
3
20
)÷
7
10

=
7
20
÷
7
10

=
1
2


(3)
7
9
÷
11
5
+
2
9
×
5
11

=
7
9
×
5
11
+
2
9
×
5
11

=
5
11
×(
7
9
+
2
9
),
=
5
11
×1,
=
5
11
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