题目内容

选择合理的方法进行计算.
5
6
+
3
4
-
1
3
11
12
-(
1
6
+
1
8
10
19
+
7
18
-
10
19
+
11
18
4-(
3
4
-
3
8
7
15
-(
1
2
-
8
15
11-
7
10
-
3
10
(1)
5
6
+
3
4
-
1
3

=
10
12
+
9
12
-
4
12

=
15
12

=1
1
4


(2)
11
12
-(
1
6
+
1
8
),
=
11
12
-(
4
24
+
3
24
),
=
22
24
-
7
24

=
15
24

=
5
8


(3)
10
19
+
7
18
-
10
19
+
11
18

=(
10
19
-
10
19
)+(
7
18
+
11
18
),
=0+1,
=1;

(4)4-(
3
4
-
3
8
),
=4-(
6
8
-
3
8
),
=4-
3
8

=3
5
8


(5)
7
15
-(
1
2
-
8
15
)

=
7
15
+
8
15
-
1
2

=1-
1
2

=
1
2


(6)11-
7
10
-
3
10

=11-(
7
10
+
3
10
),
=11-1,
=10;
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