题目内容
解方程和比例
6.5:X=3.25:4
X-X=17
X-
=
.
6.5:X=3.25:4
| 3 |
| 20 |
| 2 |
| 3 |
| 12 |
| 5 |
| 13 |
| 5 |
6.5:X=3.25:4,
3.25X=6.5×4,
3.25X=26,
X=26÷3.25,
X=8;
X-X=17,
(
-1)X=17,
-
X=17,
X=17×(-
),
X=-20;
X-
=
,
X=
+
,
X=5,
X=5×
,
X=7
.
3.25X=6.5×4,
3.25X=26,
X=26÷3.25,
X=8;
| 3 |
| 20 |
(
| 3 |
| 20 |
-
| 17 |
| 20 |
X=17×(-
| 20 |
| 17 |
X=-20;
| 2 |
| 3 |
| 12 |
| 5 |
| 13 |
| 5 |
| 2 |
| 3 |
| 13 |
| 5 |
| 12 |
| 5 |
| 2 |
| 3 |
X=5×
| 3 |
| 2 |
X=7
| 1 |
| 2 |
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