题目内容
直接写出得数.
|
|
6-
|
| ||||||||||||||||||||||
4-
|
|
|
|
分析:(1)只把分子相加,分母不变;
(2)(4)题,先通分再计算;
(3)把6化成分数,再计算;
(5)(6)(7)(8)题,运用加法交换律或结合律简算.
(2)(4)题,先通分再计算;
(3)把6化成分数,再计算;
(5)(6)(7)(8)题,运用加法交换律或结合律简算.
解答:解:(1)
+
=
;
+
=
; 6-
=5
;
+
=
;
4-
-
=3;
-(
-
)=
;
-
+
=
;
+
+
=1
.
| 7 |
| 8 |
| 5 |
| 8 |
| 3 |
| 2 |
| 1 |
| 5 |
| 1 |
| 7 |
| 12 |
| 35 |
| 1 |
| 4 |
| 3 |
| 4 |
| 3 |
| 11 |
| 1 |
| 22 |
| 7 |
| 22 |
4-
| 6 |
| 13 |
| 7 |
| 13 |
| 7 |
| 8 |
| 7 |
| 8 |
| 1 |
| 5 |
| 1 |
| 5 |
| 1 |
| 2 |
| 2 |
| 5 |
| 1 |
| 2 |
| 3 |
| 5 |
| 1 |
| 7 |
| 1 |
| 3 |
| 6 |
| 7 |
| 1 |
| 3 |
点评:此题考查了分数的计算,有的要运用运算定律进行简算.
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