题目内容
直接写出得数.
|
|
|
|
| ||||||||||||||||||
|
|
15÷
|
|
|
分析:①②约分计算;③⑤⑥题,通分计算;④只把分子相加,分母不变;⑦⑧⑨⑩题,先把除法改为乘法,再计算.
解答:解:
×
=
;
×39=21;
-
=
;
+
=
;
+
=
;
-
=
;
÷4=
; 15÷
=
;
÷
=
;
÷5=
.
| 7 |
| 8 |
| 5 |
| 14 |
| 5 |
| 16 |
| 7 |
| 13 |
| 5 |
| 6 |
| 1 |
| 2 |
| 1 |
| 3 |
| 3 |
| 10 |
| 9 |
| 10 |
| 6 |
| 5 |
| 1 |
| 3 |
| 5 |
| 7 |
| 22 |
| 21 |
| 3 |
| 4 |
| 1 |
| 8 |
| 5 |
| 8 |
| 8 |
| 9 |
| 2 |
| 9 |
| 10 |
| 13 |
| 39 |
| 2 |
| 1 |
| 3 |
| 3 |
| 4 |
| 4 |
| 9 |
| 5 |
| 8 |
| 1 |
| 8 |
点评:此题考查了分数的加、减、乘、除运算,掌握运算方法,是解答的关键.
练习册系列答案
相关题目