题目内容
解方程
5
|
| 4.5×
|
(1)5
÷x=
,
5
÷x×x=
x,
5
=
x,
5
÷
=
x÷
,
x=
;
(2)
-
x=
,
-
x+
x=
+
x,
=
+
x,
-
=
+
x-
,
=
x,
÷
=
=
x÷
,
x=1;
(3)4.5×
-3
x=1.5,
1.5-3.5x=1.5,
1.5-3.5x+3.5x=1.5+3.5x,
1.5=1.5+3.5x,
1.5-1.5=1.5+3.5x-1.5,
0=3.5x,
0÷3.5=3.5x÷3.5,
x=0.
| 5 |
| 9 |
| 10 |
| 11 |
5
| 5 |
| 9 |
| 10 |
| 11 |
5
| 5 |
| 9 |
| 10 |
| 11 |
5
| 5 |
| 9 |
| 10 |
| 11 |
| 10 |
| 11 |
| 10 |
| 11 |
x=
| 55 |
| 9 |
(2)
| 2 |
| 3 |
| 1 |
| 6 |
| 1 |
| 2 |
| 2 |
| 3 |
| 1 |
| 6 |
| 1 |
| 6 |
| 1 |
| 2 |
| 1 |
| 6 |
| 2 |
| 3 |
| 1 |
| 2 |
| 1 |
| 6 |
| 2 |
| 3 |
| 1 |
| 2 |
| 1 |
| 2 |
| 1 |
| 6 |
| 1 |
| 2 |
| 1 |
| 6 |
| 1 |
| 6 |
| 1 |
| 6 |
| 1 |
| 6 |
| 1 |
| 6 |
| 1 |
| 6 |
| 1 |
| 6 |
x=1;
(3)4.5×
| 1 |
| 3 |
| 1 |
| 2 |
1.5-3.5x=1.5,
1.5-3.5x+3.5x=1.5+3.5x,
1.5=1.5+3.5x,
1.5-1.5=1.5+3.5x-1.5,
0=3.5x,
0÷3.5=3.5x÷3.5,
x=0.
练习册系列答案
相关题目