1
6
+
5
6
=
3
10
+
2
10
=
17
25
-
7
25
=
2
9
+
5
9
+
8
9
=		 1-
3
8
-
1
8
=
2
13
+
8
13
-
7
13
=
分析：根據(jù)同分母分?jǐn)?shù)加減法的計(jì)算方法進(jìn)行計(jì)算即可．
解答：解：
1
6
+
5
6
=1，
3
10
+
2
10
=
1
2
，
17
25
-
7
25
=
2
5
，
2
9
+
5
9
+
8
9
=
5
3
，		 1-
3
8
-
1
8
=
1
2
，
2
13
+
8
13
-
7
13
=
3
13
．
點(diǎn)評(píng)：同分母分?jǐn)?shù)相加減，分母不變，只把分子相加減．
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