题目内容

计算:
(1)
1
3
+
1
4
1-
3
5
×
7
12
=
(2)
0.5-
1
8
÷
5
12
6
1
5
-4
3
4
=
(3)
5
2
5
-1
2
3
3
8
+
5
12
×
7
10
=
(4)
1-2
1
5
÷3
1
7
1
1
4
+
2
5
=
(5)
(18-16
3
7
)×2.8
2.75+1
5
6
=
(6)
1÷0.35
(
1
3
+
1
4
)×1
3
7
=
(1)
1
3
+
1
4
1-
3
5
×
7
12

=
7
12
1-
7
20

=
7
12
13
20

=
7
12
×
20
13

=
35
39


(2)
0.5-
1
8
÷
5
12
6
1
5
-4
3
4

=
1
2
-
1
8
×
12
5
6
4
20
-4
15
20

=
1
2
-
3
10
29
20

=
(
1
2
-
3
10
)×20
29
20
×20

=
4
29


(3)
5
2
5
-1
2
3
3
8
+
5
12
×
7
10

=
5
6
15
-1
10
15
3
8
+
7
24

=
56
15
2
3

=
56
15
×
3
2

=
28
5


(4)
1-2
1
5
÷3
1
7
1
1
4
+
2
5

=
1-
11
5
×
7
22
1
5
20
+
8
20

=
1-
7
10
33
20

=
3
10
×
20
33

=
2
11


(5)
(18-16
3
7
)×2.8
2.75+1
5
6

=
(18-
115
7
)×2.8
2
3
4
+1
5
6

=
50.4-46
55
12

=4.4×
12
55

=0.96.
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