题目内容

怎样简便就怎样算
1
4
+
3
4
×3
5-
7
8
-0.125
7
9
÷
11
5
+
2
9
×
5
11
[
1
2
-(
3
4
-
3
5
)]÷
7
10
(1)
1
4
+
3
4
×3,
=
1
4
+
9
4

=
5
2


(2)5-
7
8
-0.125,
=5-(0.875+0.125),
=5-1,
=4;

(3)
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


(4)[
1
2
-(
3
4
-
3
5
)]÷
7
10

=[
1
2
-
3
20
7
10

=
7
20
÷
7
10

=
1
2
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