题目内容
求未知数x.
①
x+
x=42
②0.36÷x=0.9.
①
| 2 |
| 3 |
| 1 |
| 2 |
②0.36÷x=0.9.
①
x+
x=42,
(
+
)x=42,
x=42,
x÷
=42÷
,
x=42×
,
x=36;
②0.36÷x=0.9,
0.36÷x×x=0.9×x,
0.9x=0.36,
0.9x÷0.9=0.36÷0.9,
x=0.4.
| 2 |
| 3 |
| 1 |
| 2 |
(
| 2 |
| 3 |
| 1 |
| 2 |
| 7 |
| 6 |
| 7 |
| 6 |
| 7 |
| 6 |
| 7 |
| 6 |
x=42×
| 6 |
| 7 |
x=36;
②0.36÷x=0.9,
0.36÷x×x=0.9×x,
0.9x=0.36,
0.9x÷0.9=0.36÷0.9,
x=0.4.
练习册系列答案
相关题目