题目内容

下面各式中，计算结果较大的是（　　）
A．
1
2
+
1
3
B．
1
4
+
1
5
+
1
6
C．
1
3
+
1
4
A：
1
2
+
1
3
=
2+3
6
=
5
6
；
B：
1
4
+
1
5
+
1
6
=
15+12+10
60
=
37
60
；
C：
1
3
+
1
4
=
3+4
12
=
7
12
；
5
6
=
50
60
，
7
12
=
35
60
，
50
60
＞
37
60
＞
35
60
，
故答案为：A．
练习册系列答案
相关题目
计算下面各题．
3
7
+
1
7
+
5
7
=
2
5
+
4
5
-
3
5
=
7
12
+
3
4
-
2
3
=
5
9
+
7
9
-
4
9
=
1
5
+
1
15
-
1
45
=
25
33
+
7
22
-
25
33
=
直接写出得数．
2
7
+
3
7
=
7
8
-
5
8
=
1
2
+
1
3
=		1-
2
5
=
2
9
+
7
9
=
8
15
-
1
3
=
3
4
+
3
8
=
4
7
-
1
2
=
1
12
+
3
12
=		2+
5
6
=
a
2
+
b
7
=
9
14
，则a+b=______．
直接写出得数．
1
3
+
1
3
=		1-
2
5
=
5
8
-
3
8
=
1
7
+
3
7
+
2
7
=
1-
5
6
=
3
8
+
5
8
=
2
9
+
5
9
=		1-
5
12
-
7
12
=
3
4
-
1
2
=
1
6
+
2
3
=
1
2
-
1
3
=
3
8
+
3
8
-
5
8
=
直接写出得数
0.4-
1
7
=
5
7
÷
3
5
=
5
6
÷0.1=		6×
6
7
-5×
5
7
=
5
7
×
5
7
÷
5
7
×
5
7
=
8.4-2.8-3.2=63×（
1
7
-
1
9
）=		1÷
1
5
-
1
5
÷1=		8×2.7×1
1
4
=		0.5+
1
4
=
1
8
+
3
8
=
3
10
+
9
10
=
7
16
-
3
16
=		1-
5
18
=
19
12
-1=
17
20
+
7
20
=
5
6
+（
1
6
+
1
6
）=
17
30
+
23
30
-
7
30
=
1-（
2
9
+
4
9
）=		1-
5
12
+
11
12
=
1
10
-0.01=		2
2
5
+
1
2
=		27
18
19
÷9=		（
1
4
-
1
6
）×12=		0.39÷2
3
5
=		2
1
5
+5.75=
1
3
7
÷1
2
7
=		7-7÷9=
2
3
×1.8=		0.6÷
3
5
=		2.1÷0.35=1
3
20
÷1+0.15=
直接写得数．
1
3
-
1
4
=
1
4
+
3
8
=
2
5
×30=
5
6
÷5=		2÷
2
3
=
470-407=13×50=8.64-5.04=500÷25=4.57+5.43=

违法和不良信息举报电话：027-86699610 举报邮箱：58377363@163.com

精英家教网