问题 解答题
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
答案

(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;

单项选择题 共用题干题
多项选择题