题目内容
解方程,我没问题!
X+3X=
4x-1.6x=3660%x=4.2.
X+3X=
| 2 |
| 5 |
(1)X+3X=
,
4X=
,
4X×
=
×
,
X=
;
(2)4x-1.6x=36,
(4-1.6)x=36,
2.4x=36,
2.4x÷2.4=36÷2.4,
x=15;
(3)60%x=4.2,
0.6x=4.2,
0.6x÷0.6=4.2÷0.6,
x=7.
| 2 |
| 5 |
4X=
| 2 |
| 5 |
4X×
| 1 |
| 4 |
| 2 |
| 5 |
| 1 |
| 4 |
X=
| 1 |
| 10 |
(2)4x-1.6x=36,
(4-1.6)x=36,
2.4x=36,
2.4x÷2.4=36÷2.4,
x=15;
(3)60%x=4.2,
0.6x=4.2,
0.6x÷0.6=4.2÷0.6,
x=7.
练习册系列答案
相关题目