题目内容

1
12
×
3
5
+
1
3
÷
5
12
5
8
-
1
4
÷
5
12
)×(1+
2
3
(
2
3
+
1
4
3
11
+
3
8
32÷
4
5
-17.5-2.5
2
11
×55+
3
5
÷
1
25
5
11
+5×
5
11
+
5
11
×5
(1)
1
12
×
3
5
+
1
3
÷
5
12

=
1
20
+
4
5

=
17
20


(2)(
5
8
-
1
4
÷
5
12
)×(1+
2
3
),
=(
5
8
-
3
5
)×
5
3

=
1
40
×
5
3

=
1
24


(3)(
2
3
+
1
4
)×
3
11
+
3
8

=
11
12
×
3
11
+
3
8

=
1
4
+
3
8

=
5
8


(4)32÷
4
5
-17.5-2.5,
=40-20,
=20;

(5)
2
11
×55+
3
5
÷
1
25

=10+15,
=25;

(6)
5
11
+5×
5
11
+
5
11
×5,
=
5
11
×(1+5+5),
=
5
11
×11,
=5.
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