问题 解答题
用你喜欢的方法计算.
9
10
-
7
10
+
3
5

1
3
+
1
4
+
1
5

1
12
+
1
6
+
1
3

3
8
+
7
16
-
3
8

1-
1
8
-
3
8

1
7
+
3
14
+
6
7
答案

(1)

9
10
-
7
10
+
3
5

=

1
5
+
3
5

=

4
5

(2)

1
3
+
1
4
+
1
5

=

20
60
+
15
60
+
12
60

=

35
60
+
12
60

=

47
60

(3)

1
12
+
1
6
+
1
3

=

1
12
+
2
12
+
4
12

=

3
12
+
4
12

=

7
12

(4)

3
8
+
7
16
-
3
8

=

3
8
-
3
8
+
7
16

=0+

7
16

=

7
16

(5)1-

1
8
-
3
8

=1-(

1
8
+
3
8
),

=1-

1
2

=

1
2

(6)

1
7
+
3
14
+
6
7

=

1
7
+
6
7
+
3
14

=1+

3
14

=1

3
14

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