题目内容
巧解密码我能行. 5x-5×
|
12:5=x:0.3 |
|
(1)5x-5×
=0.8,
5x-
=0.8,
5x-
+
=0.8+
,
5x=
,
5x÷5=
÷5,
x=
;
(2)12:5=x:0.3,
5x=12×0.3,
5x÷5=3.6÷5,
x=0.72;
(3)
=
,
9x=0.45×16,
9x÷9=7.2÷9,
x=0.8.
1 |
3 |
5x-
5 |
3 |
5x-
5 |
3 |
5 |
3 |
5 |
3 |
5x=
37 |
15 |
5x÷5=
37 |
15 |
x=
37 |
75 |
(2)12:5=x:0.3,
5x=12×0.3,
5x÷5=3.6÷5,
x=0.72;
(3)
0.45 |
x |
9 |
16 |
9x=0.45×16,
9x÷9=7.2÷9,
x=0.8.
练习册系列答案
相关题目
巧解密码,我能行:
5X-4.5×2=0.5 | 12:=X:. |