问题 解答题
下面各题怎样算简便就怎样算.
5
+
1
6
-
1
3
3
4
+
5
6
-
1
6
13
15
-(
1
4
-
1
15
)
5
+(
1
3
-
3
14
)
5
-
3
8
+
3
5
-
5
8
8
右右
+
4
+
3
右右
+
4
答案

(1)

2
f
+
1
6
-
1
3

=

12
30
+
f
30
-
10
30

=

h
30

(2)

3
4
+
f
6
-
1
6

=

3
4
+(
f
6
-
1
6

=

3
4
+
2
3

=

1h
12

(3)

13
1f
-(
1
4
-
1
1f
)

=

13
1f
-
1
4
+
1
1f

=

13
1f
+
1
1f
-
1
4

=

14
1f
-
1
4

=

41
60

(4)

f
h
+(
1
3
-
3
14
)

=

f
h
-
3
14
+
1
3

=

1
2
+
1
3

=

f
6

(f)

2
f
-
3
+
3
f
-
f

=(

2
f
+
3
f
)-(
3
+
f

=1-1

=0;

(6)

2h
+
4
9
+
3
2h
+
4
9

=(

2h
+
3
2h
)+(
4
9
+
4
9

=

11
2h
+
9

=

3f
2h

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