题目内容
解方程.
5X-3×
|
|
(1)5X-3×
=1.4,
5X-2.1=1.4,
5X-2.1+2.1=1.4+2.1,
5X=3.5,
5X÷5=3.5÷5,
X=0.7;
(2)
X+50%X=
÷
,
0.9X=9,
0.9X÷0.9=9÷0.9,
X=10.
| 7 |
| 10 |
5X-2.1=1.4,
5X-2.1+2.1=1.4+2.1,
5X=3.5,
5X÷5=3.5÷5,
X=0.7;
(2)
| 2 |
| 5 |
| 18 |
| 11 |
| 2 |
| 11 |
0.9X=9,
0.9X÷0.9=9÷0.9,
X=10.
练习册系列答案
相关题目