题目内容
| 解方程. ①0.3x=0.45 | ②x-
| ||||||
| ③5x-4.3x=65.8+4.2 | ④6-(x+
|
①0.3x=0.45,
0.3x÷0.3=4.5÷0.3,
x=15,
②x-
+
=
,
x-
+
=
,
x+
-
+
-
=
+
-
,
x=1;
③5x-4.3x=65.8+4.2,
0.7x=70,
0.7x÷0.7=70÷0.7,
x=100;
④6-(x+
)=0.25×20,
6-x-
=5,
5
-x=5,
5.4-5+x-x=5-5+x,
x=0.4.
0.3x÷0.3=4.5÷0.3,
x=15,
②x-
| 7 |
| 11 |
| 1 |
| 7 |
| 39 |
| 77 |
x-
| 49 |
| 77 |
| 11 |
| 77 |
| 39 |
| 77 |
x+
| 49 |
| 77 |
| 49 |
| 77 |
| 11 |
| 77 |
| 11 |
| 77 |
| 39 |
| 77 |
| 49 |
| 77 |
| 11 |
| 77 |
x=1;
③5x-4.3x=65.8+4.2,
0.7x=70,
0.7x÷0.7=70÷0.7,
x=100;
④6-(x+
| 3 |
| 5 |
6-x-
| 3 |
| 5 |
5
| 2 |
| 5 |
5.4-5+x-x=5-5+x,
x=0.4.
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