题目内容
解方程.
①1-
x=
②0.4:0.25=
.
①1-
| 1 |
| 4 |
| 1 |
| 4 |
②0.4:0.25=
| 12 |
| x |
(1)1-
X=
,
1-
X+
X=
+
X
+
X=1,
+
X-
=1-
,
X=
,
X÷
=
÷
,
X=3;
(2)0.4:0.25=
,
0.4X=0.25×12,
0.4X=3,
0.4X÷0.4=3÷0.4,
X=7.5.
| 1 |
| 4 |
| 1 |
| 4 |
1-
| 1 |
| 4 |
| 1 |
| 4 |
| 1 |
| 4 |
| 1 |
| 4 |
| 1 |
| 4 |
| 1 |
| 4 |
| 1 |
| 4 |
| 1 |
| 4 |
| 1 |
| 4 |
| 1 |
| 4 |
| 1 |
| 4 |
| 3 |
| 4 |
| 1 |
| 4 |
| 1 |
| 4 |
| 3 |
| 4 |
| 1 |
| 4 |
X=3;
(2)0.4:0.25=
| 12 |
| X |
0.4X=0.25×12,
0.4X=3,
0.4X÷0.4=3÷0.4,
X=7.5.
练习册系列答案
相关题目