问题
解答题
求未知数x的值
|
答案
（1）16÷x=0.75：
| 15 |
| 8 |
16÷x=0.75÷
| 15 |
| 8 |
16÷x=0.4，
16÷x×x=0.4×x，
0.4x=16，
0.4x÷0.4=16÷0.4，
x=40；
（2）0.36÷5-
| 3 |
| 4 |
| 4 |
| 5 |
0.072-
| 3 |
| 4 |
| 4 |
| 5 |
0.072-
| 3 |
| 4 |
| 3 |
| 4 |
| 4 |
| 5 |
| 3 |
| 4 |
| 3 |
| 4 |
| 4 |
| 5 |
| 3 |
| 4 |
| 4 |
| 5 |
| 4 |
| 5 |
| 4 |
| 5 |
| 3 |
| 4 |
| 3 |
| 4 |
| 3 |
| 4 |
| 3 |
| 4 |
x=-
| 364 |
| 375 |