直接寫得數(shù).
1
3
+
1
4
=
7
12

1
2
-
1
6
=
1
3

1-
1
8
=
7
8

3
4
-0.25=0.5

6+
1
8
=6
1
8
1
6
+
5
6
=1
1
9
+
5
9
=
2
3
2
3
-
2
9
=
4
9
1-
7
10
-
3
10
=0
3
7
+
4
13
+
9
13
=1
3
7
分析:根據(jù)分數(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

1
2
-
1
6
=
1
3

1-
1
8
=
7
8

3
4
-0.25=0.5

6+
1
8
=6
1
8
1
6
+
5
6
=1
1
9
+
5
9
=
2
3
2
3
-
2
9
=
4
9
1-
7
10
-
3
10
=0
3
7
+
4
13
+
9
13
=1
3
7
點評:此題主要考查的是分數(shù)加減法的計算方法.
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