问题 解答题
脱式计算,能简算的要简算
11
12
-(
1
6
+
1
8
)  
8
9
-
1
6
+
1
9
-
1
6

1-
1
4
+
3
4

1
2
-(
3
4
-
3
8
答案

(1)

11
12
-(
1
6
+
1
8
),

=

22
24
-(
4
24
+
3
24
),

=

22
24
-
7
24

=

5
8

(2)

8
9
-
1
6
+
1
9
-
1
6

=(

8
9
+
1
9
)-(
1
6
+
1
6
),

=1-

1
3

=

2
3

(3)1-

1
4
+
3
4

=

3
4
+
3
4

=

3
2

(4)

1
2
-(
3
4
-
3
8
),

=

4
8
-(
6
8
-
3
8
),

=

4
8
-
3
8

=

1
8

判断题
填空题