题目内容

3
4
+
1
4
=
3
5
×
1
2
=
1
2
÷3
=
5
6
-
1
6
=
1
2
-
1
3
=
3
8
×12
=
3
8
÷
3
2
=
5
7
÷
10
21
=
1.4-
2
5
=
4
7
×
3
4
=
0.25-
1
4
=
1
2
9
×1.8
=
分析:完成本题据分数加法、减法、乘法、除法的运算法则计算即可.
解答:
解:
3
4
+
1
4
=1
3
5
×
1
2
=
3
10
1
2
÷3
=
1
6
5
6
-
1
6
=
2
3
1
2
-
1
3
=
1
6
3
8
×12
=
9
2
3
8
÷
3
2
=
5
7
÷
10
21
=
3
2
1.4-
2
5
=1
4
7
×
3
4
=
3
7
0.25-
1
4
=1
1
2
9
×1.8
=
11
5
点评:完成有关于分数的算式时要注意通分、约分.
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