直接寫得數(shù).
1
3
+
1
4
=
5
8
+
5
16
=
5
8
-
1
4
=
1
2
+
2
3
=
2
5
-
1
3
=
1
7
+
1
8
=
4
5
+
1
5
=
7
9
-
1
9
=
1
6
-
1
10
=
13
18
-
1
3
=
分析:根據(jù)分?jǐn)?shù)加減法的計算方法進行計算即可得到答案.
解答:解:
1
3
+
1
4
=
7
12
5
8
+
5
16
=
15
16
5
8
-
1
4
=
3
8
1
2
+
2
3
=1
1
6
2
5
-
1
3
=
1
15
1
7
+
1
8
=
15
56
4
5
+
1
5
=1
7
9
-
1
9
=
2
3
1
6
-
1
10
=
1
15
13
18
-
1
3
=
7
18
點評:此題主要考查的是分?jǐn)?shù)計算方法的應(yīng)用.
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