题目内容
| 解方程. x÷
|
| 25%x=10 | ||||||||||||||
| x-
|
|
(1)x÷
=3
x÷
×
=3×
x=2;
(2)
x=
x÷
=
÷
x=1;
(3)25%x=10
25%x÷25%=10÷25%
x=40;
(4)
÷x=
÷x×x=
×x
÷
=
x÷
x=
;
(5)x-
=
x-
+
=
+
x=1;
(6)
n÷
=
n÷
×
=
×
n÷
=
÷
n=
.
| 2 |
| 3 |
x÷
| 2 |
| 3 |
| 2 |
| 3 |
| 2 |
| 3 |
x=2;
(2)
| 3 |
| 5 |
| 3 |
| 5 |
| 3 |
| 5 |
| 3 |
| 5 |
| 3 |
| 5 |
| 3 |
| 5 |
x=1;
(3)25%x=10
25%x÷25%=10÷25%
x=40;
(4)
| 2 |
| 7 |
| 3 |
| 7 |
| 2 |
| 7 |
| 3 |
| 7 |
| 2 |
| 7 |
| 3 |
| 7 |
| 3 |
| 7 |
| 3 |
| 7 |
x=
| 2 |
| 3 |
(5)x-
| 2 |
| 3 |
| 1 |
| 3 |
x-
| 2 |
| 3 |
| 2 |
| 3 |
| 1 |
| 3 |
| 2 |
| 3 |
x=1;
(6)
| 1 |
| 2 |
| 2 |
| 7 |
| 1 |
| 2 |
| 1 |
| 2 |
| 2 |
| 7 |
| 2 |
| 7 |
| 1 |
| 2 |
| 2 |
| 7 |
| 1 |
| 2 |
| 1 |
| 2 |
| 1 |
| 7 |
| 1 |
| 2 |
n=
| 2 |
| 7 |
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