题目内容
x-
|
x÷
|
x+
|
分析:①先计算方程的左边,然后根据等式的性质,在方程两边同时乘以
求解,
②先整理方程的左边,再根据等式的性质,在方程两边同时乘
求解,
③先加上方程的左边,再根据等式的性质,在方程两边同时乘以
求解.
| 5 |
| 4 |
②先整理方程的左边,再根据等式的性质,在方程两边同时乘
| 2 |
| 9 |
③先加上方程的左边,再根据等式的性质,在方程两边同时乘以
| 6 |
| 7 |
解答:解:①x-
x=
x=
x×
=
×
x=
;
②x÷
=
x×
=
x×
×
=
×
x=
;
③x+
x=
x=
x×
=
×
x=1.
| 1 |
| 5 |
| 3 |
| 10 |
| 4 |
| 5 |
| 3 |
| 10 |
| 4 |
| 5 |
| 5 |
| 4 |
| 3 |
| 10 |
| 5 |
| 4 |
x=
| 3 |
| 8 |
②x÷
| 2 |
| 9 |
| 6 |
| 7 |
x×
| 9 |
| 2 |
| 6 |
| 7 |
x×
| 9 |
| 2 |
| 2 |
| 9 |
| 6 |
| 7 |
| 2 |
| 9 |
x=
| 4 |
| 21 |
③x+
| 1 |
| 6 |
| 7 |
| 6 |
| 7 |
| 6 |
| 7 |
| 6 |
| 7 |
| 6 |
| 6 |
| 7 |
| 7 |
| 6 |
| 6 |
| 7 |
x=1.
点评:本题考查了学生根据等式的性质解答方程的能力,注意等号对齐.
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