题目内容
| 解方程或比例. ①2.3x-2.5×4=36 | ②
| ③
|
①2.3x-2.5×4=36,
2.3x-10=36,
2.3x-10+10=36+10,
2.3x=46,
2.3x÷2.3=46÷2.3,
x=20;
②
X-
X=
,
X=
,
X÷
=
÷
,
X=
;
③
=
,
2.4x=3.2×12,
2.4x=38.4,
2.4x÷2.4=38.4÷2.4,
x=16.
2.3x-10=36,
2.3x-10+10=36+10,
2.3x=46,
2.3x÷2.3=46÷2.3,
x=20;
②
| 2 |
| 5 |
| 1 |
| 3 |
| 3 |
| 25 |
| 1 |
| 15 |
| 3 |
| 25 |
| 1 |
| 15 |
| 1 |
| 15 |
| 3 |
| 25 |
| 1 |
| 15 |
X=
| 9 |
| 5 |
③
| 3.2 |
| 2.4 |
| x |
| 12 |
2.4x=3.2×12,
2.4x=38.4,
2.4x÷2.4=38.4÷2.4,
x=16.
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