题目内容

1
3
+
2
3
÷
5
12
．
分析：本题据分数的四则混合运算顺序计算即可：先算乘除，再算加减．
解答：解：
1
3
+
2
3
÷
5
12

=
1
3
+
8
5
，
=
29
15
．
点评：计算此类题目要注意通分、约分．
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相关题目
直接写出得数．
1-
3
8
=
4
5
+
7
10
=		 4-(
1
6
+
5
6
)=
7
9
+
5
12
=
7
15
+
1
15
=
5
6
-
1
3
=		 2-
1
3
-
2
3
=
1
5
-
1
6
=
直接写出得数：
1
3
+
5
12
=		 8+
2
5
=
1
2
-
1
3
=
5
7
-
3
7
=		 0.5-
1
2
=
10-
2
5
-
3
5
=
1
3
+
2
3
=		 1-
1
6
=		 4-
2
9
=
4+
6
7
=
直接写得数
1
3
+
2
3
=
7
8
+
3
8
=		 1-
9
11
=
5
12
-
1
6
=
5
6
-
1
6
=
3
4
-
1
2
=
9
20
+
3
20
+1=
1
7
+
2
7
+
3
7
=
1
5
+
1
3
=
2
5
+
3
10
=		 1-
5
12
-
7
12
=
3
11
+
9
11
-
1
11
=
直接写出得数
7
9
-
4
9
=
1
10
+
7
15
=
3
8
×
4
15
=
4
9
÷
2
3
=
5
12
×
1
3
=		 1-
2
7
=

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