题目内容
解方程.
x+
=11
6-
x=
.
| 3 |
| 5 |
| 19 |
| 2 |
6-
| 5 |
| 7 |
| 9 |
| 14 |
分析:(1)根据等式的性质,两边同减去
,再同乘
即可;
(2)根据等式的性质,两边同加上
x,得
+
x=6,两边同减去
,再同乘
即可.
| 19 |
| 2 |
| 5 |
| 3 |
(2)根据等式的性质,两边同加上
| 5 |
| 7 |
| 9 |
| 14 |
| 5 |
| 7 |
| 9 |
| 14 |
| 7 |
| 5 |
解答:解:(1)
x+
=11,
x+
-
=11-
,
x=
,
x×
=
×
,
x=
;
(2)6-
x=
,
6-
x+
x=
+
x,
+
x=6,
+
x-
=6-
,
x=
,
x×
=
×
,
x=
.
| 3 |
| 5 |
| 19 |
| 2 |
| 3 |
| 5 |
| 19 |
| 2 |
| 19 |
| 2 |
| 19 |
| 2 |
| 3 |
| 5 |
| 3 |
| 2 |
| 3 |
| 5 |
| 5 |
| 3 |
| 3 |
| 2 |
| 5 |
| 3 |
x=
| 5 |
| 2 |
(2)6-
| 5 |
| 7 |
| 9 |
| 14 |
6-
| 5 |
| 7 |
| 5 |
| 7 |
| 9 |
| 14 |
| 5 |
| 7 |
| 9 |
| 14 |
| 5 |
| 7 |
| 9 |
| 14 |
| 5 |
| 7 |
| 9 |
| 14 |
| 9 |
| 14 |
| 5 |
| 7 |
| 75 |
| 14 |
| 5 |
| 7 |
| 7 |
| 5 |
| 75 |
| 14 |
| 7 |
| 5 |
x=
| 15 |
| 2 |
点评:在解方程时应根据等式的性质,即等式两边同加上、同减去、同乘上或同除以某一个数(0除外),等式的两边仍相等,同时注意“=”上下要对齐.
练习册系列答案
相关题目