题目内容
求未知数x.
16-40%x=12
x+
x=1.6
16:x=0.75:
.
16-40%x=12
| 5 |
| 9 |
| 1 |
| 3 |
16:x=0.75:
| 15 |
| 8 |
(1)16-40%x=12
16-40%x+40%x=12+40%x
16-12=12+40%x-12
4÷40%=40%÷40%
x=10;
(2)
x+
x=1.6
x=1.6
x÷
=1.6÷
x=1.8;
(3)16:x=0.75:
0.75x=16×
0.75x÷0.75=30÷0.75
x=40.
16-40%x+40%x=12+40%x
16-12=12+40%x-12
4÷40%=40%÷40%
x=10;
(2)
| 5 |
| 9 |
| 1 |
| 3 |
| 8 |
| 9 |
| 8 |
| 9 |
| 8 |
| 9 |
| 8 |
| 9 |
x=1.8;
(3)16:x=0.75:
| 15 |
| 8 |
0.75x=16×
| 15 |
| 8 |
0.75x÷0.75=30÷0.75
x=40.
练习册系列答案
相关题目