题目内容
解下列方程.
+
X=
X-
X=27 X×
=
.
| 4 |
| 5 |
| 1 |
| 2 |
| 9 |
| 10 |
| 4 |
| 13 |
| 1 |
| 3 |
| 5 |
| 9 |
(1)
x+
X=
,
x=
,
x÷
=
÷
,
x=
;
(2)X-
X=27,
x=27,
x÷
=27÷
,
x=39;
(3)X×
=
,
X×
÷
=
÷
,
x=1
.
| 4 |
| 5 |
| 1 |
| 2 |
| 9 |
| 10 |
| 13 |
| 10 |
| 9 |
| 10 |
| 13 |
| 10 |
| 13 |
| 10 |
| 9 |
| 10 |
| 13 |
| 10 |
x=
| 9 |
| 13 |
(2)X-
| 4 |
| 13 |
| 9 |
| 13 |
| 9 |
| 13 |
| 9 |
| 13 |
| 9 |
| 13 |
x=39;
(3)X×
| 1 |
| 3 |
| 5 |
| 9 |
X×
| 1 |
| 3 |
| 1 |
| 3 |
| 5 |
| 9 |
| 1 |
| 3 |
x=1
| 2 |
| 3 |
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