题目内容
求未知数x的值.
①x+
=2
②111x=3
③
-13=0
④1.2:x=
.
①x+
| 2 |
| 3 |
②111x=3
③
| x |
| 5 |
④1.2:x=
| 4 |
| 3 |
(1)x+
=2,
x+
-
=2-
,
x=1
;
(2)111x=3,
111x÷111=3÷111,
x=37;
(3)
-13=0,
-13+13=0+13,
×5=13×5,
x=65;
(4)1.2:x=
,
4x=1.2×3,
4x÷4=3.6÷4,,
x=0.9.
| 2 |
| 3 |
x+
| 2 |
| 3 |
| 2 |
| 3 |
| 2 |
| 3 |
x=1
| 1 |
| 3 |
(2)111x=3,
111x÷111=3÷111,
x=37;
(3)
| x |
| 5 |
| x |
| 5 |
| x |
| 5 |
x=65;
(4)1.2:x=
| 4 |
| 3 |
4x=1.2×3,
4x÷4=3.6÷4,,
x=0.9.
练习册系列答案
相关题目