题目内容
| 解方程. x+
| x-
| x÷0.9=81 | 4x=
|
(1)x+
=
,
x+
-
=
-
,
x=
;
(2)x-
=
,
x-
+
=
+
,
x=
;
(3)x÷0.9=81,
x÷0.9×0.9=81×0.9,
x=72.9;
(4)4x=
+
,
4x=1;
4x÷4=1÷4,
x=0.25.
| 1 |
| 13 |
| 5 |
| 4 |
x+
| 1 |
| 13 |
| 1 |
| 13 |
| 5 |
| 4 |
| 1 |
| 13 |
x=
| 61 |
| 42 |
(2)x-
| 5 |
| 6 |
| 3 |
| 8 |
x-
| 5 |
| 6 |
| 5 |
| 6 |
| 3 |
| 8 |
| 5 |
| 6 |
x=
| 29 |
| 24 |
(3)x÷0.9=81,
x÷0.9×0.9=81×0.9,
x=72.9;
(4)4x=
| 8 |
| 15 |
| 7 |
| 15 |
4x=1;
4x÷4=1÷4,
x=0.25.
练习册系列答案
相关题目