题目内容
| 解方程 5
| 5-
| 1
| 7.5:X=1.5. |
(1)5
X-4=60,
5
X-4+4=60+4,
5
X=64,
X×
=64×
,
X=12;
(2)5-
X=3
,
5-
X+
X=3
+
X,
3
+
X=5,
3
+
X-3
=5-3
,
X=
,
X×
=
×
,
X=
;
(3)1
÷X=2
-1
,
1
÷X×X=
×X,
X=
,
X×
=
×
,
X=
;
(4)7.5:X=1.5,
1.5X=7.5,
1.5X÷1.5=7.5÷1.5,
X=5.
| 1 |
| 3 |
5
| 1 |
| 3 |
5
| 1 |
| 3 |
| 16 |
| 3 |
| 3 |
| 16 |
| 3 |
| 16 |
X=12;
(2)5-
| 5 |
| 8 |
| 1 |
| 3 |
5-
| 5 |
| 8 |
| 5 |
| 8 |
| 1 |
| 3 |
| 5 |
| 8 |
3
| 1 |
| 3 |
| 5 |
| 8 |
3
| 1 |
| 3 |
| 5 |
| 8 |
| 1 |
| 3 |
| 1 |
| 3 |
| 5 |
| 8 |
| 5 |
| 3 |
| 5 |
| 8 |
| 8 |
| 5 |
| 5 |
| 3 |
| 8 |
| 5 |
X=
| 8 |
| 3 |
(3)1
| 4 |
| 21 |
| 5 |
| 6 |
| 4 |
| 9 |
1
| 4 |
| 21 |
| 25 |
| 18 |
| 25 |
| 18 |
| 25 |
| 21 |
| 25 |
| 18 |
| 18 |
| 25 |
| 25 |
| 21 |
| 18 |
| 25 |
X=
| 6 |
| 7 |
(4)7.5:X=1.5,
1.5X=7.5,
1.5X÷1.5=7.5÷1.5,
X=5.
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