题目内容

3
4
×2=
1
6
+
1
2
=
5
9
÷5=
1
12
×
6
7
=
3
4
÷3=
5
4
×
5
4
=
5
8
÷1=		 5-
2
3
=
3
9
×12=
3
5
×
5
12
=		 4-
2
3
=
7
12
×3=
2
7
÷14=		 8+
3
5
=		 0×
13
30
=		 39×
3
13
=
8×
1
2
=
5
6
÷
3
4
=		 4×
12
7
=		 20÷
4
5
=
1-
9
10
=		 2.5×16=
5
12
÷
1
6
=
3
2
×
4
5
=
8
15
÷24=		 11÷
22
8
=
1
2
÷
3
8
=
4
7
÷
2
3
=
3
4
+
1
7
=		 1.5÷0.05= 0×
1
9
×9=		 1.5÷0.05=
5
8
÷
7
12
=
4
5
×
2
3
×
5
6
=
5
9
×
2
5
=		 2.5×0.4=
14×
5
16
=		 (
1
2
+
1
3
)×12=
14
33
×
3
7
=		 0×
7
9
=
5
8
×
5
8
=
5
21
+
4
7
=
7
9
÷7=		 2-
1
4
=
3
5
-
1
8
=
4
21
÷
8
7
=
2
3
-
1
4
=		 6.25+1.75=
1
2
÷
7
18
=
9
10
×6=
1
8
+
1
9
=
3
4
÷
4
3
=
1
2
×
2
3
=		 12-
5
7
=		 1÷
2
5
=
2
9
÷18=
7
28
÷
2
9
=		 10×1×
2
5
=		 20÷
4
5
=
1
3
×9+9×
2
3
=
42÷
21
23
=
3
8
÷12=
分析：本题按照分数加减乘除的运算法则直接运算．
解答：解：
3
4
×2=
3
2
1
6
+
1
2
=
2
3
5
9
÷5=
1
9
1
12
×
6
7
=
1
14
3
4
÷3=
1
4
5
4
×
5
4
=
25
16
5
8
÷1=
5
8
 5-
2
3
=4
1
3
3
9
×12=4
3
5
×
5
12
=
1
4
 4-
2
3
=3
1
3
7
12
×3=
7
4
2
7
÷14=
1
49
 8+
3
5
=8
3
5
 0×
13
30
=0		 39×
3
13
=9
8×
1
2
=4
5
6
÷
3
4
=
10
9
 4×
12
7
=
48
7
 20÷
4
5
=25
1-
9
10
=
1
10
 2.5×16=40
5
12
÷
1
6
=
5
2
3
2
×
4
5
=
6
5
8
15
÷24=
1
45
 11÷
22
8
=4
1
2
÷
3
8
=
4
3
4
7
÷
2
3
=
6
7
，
3
4
+
1
7
=
25
28
 1.5÷0.05=30 0×
1
9
×9=0		 1.5÷0.05=30
5
8
÷
7
12
=
15
14
4
5
×
2
3
×
5
6
=
4
9
5
9
×
2
5
=
2
9
 2.5×0.4=1
14×
5
16
=
35
8
 (
1
2
+
1
3
)×12=10
14
33
×
3
7
=
2
11
 0×
7
9
=0
5
8
×
5
8
=
25
64
5
21
+
4
7
=
17
21
7
9
÷7=
1
9
 2-
1
4
=1
3
4
3
5
-
1
8
=
19
40
4
21
÷
8
7
=
1
6
2
3
-
1
4
=
5
12
 6.25+1.75=8
1
2
÷
7
18
=
9
7
9
10
×6=
27
5
1
8
+
1
9
=
17
72
3
4
÷
4
3
=
9
16
1
2
×
2
3
=
1
3
 12-
5
7
=11
2
7
 1÷
2
5
=
5
2
2
9
÷18=
1
81
7
28
÷
2
9
=
9
8
 10×1×
2
5
=4		 20÷
4
5
=25
1
3
×9+9×
2
3
=9
42÷
21
23
=46
3
8
÷12=
1
32
点评：本题按照运算法则直接运算，注意结果化成最简分数．
练习册系列答案
相关题目
直接写出得数
1
4
+
2
4
=		 1+
3
5
=
1
3
-
1
9
=
5
7
-
3
7
=
2-
1
3
=
2
3
+
1
6
=
2
5
-
1
3
=
1
5
+
1
4
=
3-
1
4
=		 2+
1
6
=		 1.5-
7
10
=		 0.5+
1
4
=
2.5+
1
2
=
1
6
+0.5=
1
3
-0.25=
3
4
-0.7=
0.9×0.08= 6+14.4= 24÷0.04= 3.2×7÷3.2×7=
0÷3.8= 0.77+0.33= 7÷1.4= 187.7×11-187.7=
7.2÷8×4= 400÷125÷8=
3
7
÷3×
1
7
=		 （
1
4
-
1
6
）×12=
1-
5
8
÷62.5%=		 2.34-2.3= 1.9×4×0.5= 67.5+0.25=
直接写得数
3
4
÷4=
1
6
+
2
9
=
8
13
÷
4
39
=
7
12
×
4
7
=		 8×
3
4
=
2÷
1
2
=		 1÷
5
7
=		 1-
2
5
-
3
10
=		 2-
5
6
=		 2×
5
9
×
1
2
=
24÷
3
4
=		 0.2-
1
6
=		 1÷
3
2
×
3
2
=		 （3+
3
5
）×5=
3
4
+
3
4
÷
3
4
=		 3.14×32=
3
5
+
1
3
=		 100×0.1%=
0.1×30%= 2÷1%-2=

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