题目内容
| 解方程. (1)
| (2)
| (3)X×8.1=8.1 | (4)
|
(1)
X=
,
X×
=
×
,
X=
;
(2)
÷X=
,
÷X×X=
×X,
X=
,
X×4=
×4,
X=
;
(3)X×8.1=8.1,
X×8.1÷8.1=8.1÷8.1,
X=1;
(4)
X×
=20,
X=20,
X×20=20×20,
X=400.
| 3 |
| 5 |
| 5 |
| 8 |
| 3 |
| 5 |
| 5 |
| 3 |
| 5 |
| 8 |
| 5 |
| 3 |
X=
| 25 |
| 24 |
(2)
| 3 |
| 10 |
| 1 |
| 4 |
| 3 |
| 10 |
| 1 |
| 4 |
| 1 |
| 4 |
| 3 |
| 10 |
| 1 |
| 4 |
| 3 |
| 10 |
X=
| 6 |
| 5 |
(3)X×8.1=8.1,
X×8.1÷8.1=8.1÷8.1,
X=1;
(4)
| 1 |
| 4 |
| 1 |
| 5 |
| 1 |
| 20 |
| 1 |
| 20 |
X=400.
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