题目内容

3
4
-
1
2
=
1
1
5
+
1
4
=
2
1
3
-1.5
=
1
2
-0.5+
1
4
=
1
2
3
×
4
5
=
3
3
5
÷3
3
5
=
1.8×3
1
3
=
2
3
×
3
4
÷
1
6
=
3
7
÷1
1
2
=
5
9
×2.7
=
0.5÷
1
3
=
1
1
3
-1
1
3
×
1
4
=
2.5÷
1
4
=
1÷1
2
5
=
2
5
×0.1
=
分析:(1)(5)通分计算;(2)把带分数化为假分数,约分即可;(3)(14)把除法改为乘法,约分即可;(4)(12)把分数化为小数计算;(6)一个数除以本身等于1;(7)约分计算:(8)除以一个数等于乘这个数的倒数;(9)把小数化为分数计算;(10)把带分数化为甲方念书,约分计算;(11)把除法改为乘法计算;(13)把小数化为分数计算;(15)先算乘法,再算减法.
解答:解:
3
4
-
1
2
=
1
4
;           1
2
3
×
4
5
=
4
3
;               
3
7
÷1
1
2
=
2
7
;              2.5÷
1
4
=10;
1
1
5
+
1
4
=
29
20
;           3
3
5
÷3
3
5
=1;              
5
9
×2.7
=1.5;            1÷1
2
5
=
5
7

2
1
3
-1.5=
5
6
;             1.8×3
1
3
=6;               0.5÷
1
3
1.5;             
2
5
×0.1=0.04;
1
2
-0.5+
1
4
=
1
4
;          
2
3
×
3
4
÷
1
6
=3;              1
1
3
-1
1
3
×
1
4
=1.
点评:此题考查了分数的乘法和除法,根据题目特点,灵活计算.
练习册系列答案
相关题目

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