题目内容
解方程.
×X=
15÷X=
X×
=24×
.
| 2 |
| 7 |
| 8 |
| 21 |
| 5 |
| 6 |
| 9 |
| 10 |
| 1 |
| 8 |
(1)
x=
,
×x÷
=
÷
,
x=1
;
(2)15÷X=
,
15÷x×x=
x,
x=15,
x÷
=15÷
,
x=18;
(3)x×
=24×
,
x×
=3,
x×
÷
=3÷
,
x=3
.
| 2 |
| 7 |
| 8 |
| 21 |
| 2 |
| 7 |
| 2 |
| 7 |
| 8 |
| 21 |
| 2 |
| 7 |
x=1
| 1 |
| 3 |
(2)15÷X=
| 5 |
| 6 |
15÷x×x=
| 5 |
| 6 |
| 5 |
| 6 |
| 5 |
| 6 |
| 5 |
| 6 |
| 5 |
| 6 |
x=18;
(3)x×
| 9 |
| 10 |
| 1 |
| 8 |
x×
| 9 |
| 10 |
x×
| 9 |
| 10 |
| 9 |
| 10 |
| 9 |
| 10 |
x=3
| 1 |
| 3 |
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