题目内容

1÷
1
3
=
 

1÷
3
4
=
 
．
分析：根据分数除法法则计算即可求解．
解答：解：1÷
1
3
=3；
1÷
3
4
=
4
3
．
故答案为：3；
4
3
．
点评：考查了分数除法，关键是熟练掌握计算法则，正确进行计算．
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（2012?城厢区）
直接写得数：
10.2-0.98=
1
3
-
1
5
=
5
18
×
6
25
=
4
3
÷
3
2
=
1
2
×
1
3
÷
1
2
×
1
3
=		 1÷
3
4
=
1、
1
6
+
1
8
=
1
25
÷
1
100
=
1
3
÷
1
4
=
5
6
÷
1
6
=
4
5
-
3
5
=
1
6
÷
5
6
=		 5-
1
6
=
7
20
÷
1
4
=
1
6
+
1
5
=
3
5
×
1
6
=
1
2
×
4
5
=
1
6
×3=
1
2
×
2
5
=
1
4
-
1
5
=
5
8
-
1
4
=
9
10
-
9
20
=
2
3
÷
1
8
=
1
5
+
1
50
=
7
8
-
3
4
=
1
3
-
1
6
=
5
6
×
3
5
=
3
10
×135=
1
3
+
2
5
=
1
5
+
3
2
=
2
3
×
2
5
=
1
10
+
3
5
=
6
7
-
1
5
=
7
8
-
1
6
=
6
25
÷
1
5
=
9
80
-
1
10
=		 18×
5
9
=
1
7
÷
1
4
=
1
10
÷
2
15
=
7
60
÷
1
30
=
1
7
÷
5
7
=
1
5
+
1
6
=
2.4×20= 0.12×3= 0.45×2= 3×1.5=
1.2÷0.3= 1÷2= 4.8×100= 4÷0.2=
0.25×8= 0.89÷8.9= 17.8+2.2= 4.2×5=
0.8÷0.2= 5.79÷0.1= 0.35+0.65= 3.4-1.5=
8.9-0.9= 9.2-9.2= 3.6÷0.4= 0.7×11=
15.15÷15= 0.2×0.3= 1.34×4×2.5= 0.9÷4.5=
怎样简便怎样算．
19
20
÷6+
1
6
×
1
20
 18.8-
2
3
-3.8-
1
3
 (1-
3
4
×
4
5
)÷
8
15
24×（
5
8
+
5
6
）       		 58÷4+0.25×41+
1
4
1
12
÷（4-
7
15
-
8
15
）
4
5
×
1
3
+5.2×
1
3
+1÷
3
4
．

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