题目内容

脱式计算.(能简算的要简算)
1
9
÷(
1
3
-
1
9
8
9
×[
3
4
-(
7
16
-
1
4
)]
5
8
÷[
2
11
×(
1
5
+
1
6
)]
7
9
÷
11
5
+
2
9
×
5
11
5.58-
3
5
+5.42-
2
5
999
8
9
+99
8
9
+9
8
9
+
1
3
(1)
1
9
÷(
1
3
-
1
9

=
1
9
÷
2
9

=
1
2


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

=
1
2


(3)
5
8
÷[
2
11
×(
1
5
+
1
6
)]
=
5
8
÷[
2
11
×
11
30
],
=
5
8
×15,
=9
3
8


(4)
7
9
÷
11
5
+
2
9
×
5
11

=
7
9
×
5
11
+
2
9
×
5
11

=(
7
9
+
2
9
)×
5
11

=1×
5
11

=
5
11


(5)5.58-
3
5
+5.42-
2
5

=(5.58+5.42)-(
3
5
+
2
5
),
=11-1,
=10;

(6)999
8
9
+99
8
9
+9
8
9
+
1
3

=1000+100+10+
1
3
-
1
9
-
1
9
-
1
9

=1110+(
1
3
-
1
9
×
3),
=1110+(
1
3
-
1
3
).
=1110+0,
=1110.
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