题目内容
把下面计算补充完整
+
+
方法一:
+
+
=
+
=
;
=
方法二:
+
+
=
=
,
=
| 5 |
| 11 |
| 4 |
| 11 |
| 2 |
| 11 |
方法一:
| 5 |
| 11 |
| 4 |
| 11 |
| 2 |
| 11 |
=
| ( ) |
| 11 |
| 2 |
| 11 |
=
| ( ) |
| 11 |
=
1
1
方法二:
| 5 |
| 11 |
| 4 |
| 11 |
| 2 |
| 11 |
=
| 5+( )+2 |
| 11 |
=
| ( ) |
| 11 |
=
1
1
.分析:根据同分母分数加减法的计算方法进行计算.
解答:解:
方法一:
+
+
,
=
+
,
=
,
=1;
方法二:
+
+
=
,
=
,
=1.
方法一:
| 5 |
| 11 |
| 4 |
| 11 |
| 2 |
| 11 |
=
| 9 |
| 11 |
| 2 |
| 11 |
=
| 11 |
| 11 |
=1;
方法二:
| 5 |
| 11 |
| 4 |
| 11 |
| 2 |
| 11 |
=
| 5+4+2 |
| 11 |
=
| 11 |
| 11 |
=1.
点评:同分母分数相加减,分母不变,只把分子相加减.
练习册系列答案
相关题目