3
5
-
1
6
+
1
2
4
9
+
5
7
+
5
9
1-
3
8
-
5
8
3
7
+
1
2
-
3
14
4
5
-(
1
2
-
3
10
)
1
2
+
1
4
+
1
8
+
1
16
分析:根據(jù)分?jǐn)?shù)四則混合運(yùn)算的計(jì)算方法進(jìn)行計(jì)算即可得到答案.
解答:解:
3
5
-
1
6
+
1
2

=
13
30
+
15
30

=
14
15


4
9
+
5
7
+
5
9

=
4
9
+
5
9
+
5
7

=1+
5
7

=1
5
7
;

1-
3
8
-
5
8

=
5
8
-
5
8

=0;

3
7
+
1
2
-
3
14

=
6
14
+
7
14
-
3
14

=
5
7

4
5
-(
1
2
-
3
10
)

=
4
5
-
1
5

=
3
5
1
2
+
1
4
+
1
8
+
1
16

=
8
16
+
4
16
+
2
16
+
1
16

=
15
16
點(diǎn)評(píng):此題主要考查的是分?jǐn)?shù)四則混合運(yùn)算的應(yīng)用.
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