题目内容
求未知数
÷x=
x-4=28
5-
x=3.
| 3 |
| 4 |
| 4 |
| 5 |
| 8 |
| 5 |
5-
| 5 |
| 8 |
(1)
÷x=
,
÷x×x=
×x,
x=
,
x÷
=
÷
,
x=
×
,
x=
;
(2)
x-4=28,
x-4+4=28+4,
x=32,
x÷
=32÷
,
x=32×
,
x=20;
(3)5-
x=3,
5-
x+
x=3+
x,
3+
x=5,
3+
x-3=5-3,
x=2,
x÷
=2÷
,
x=2×
,
x=
.
| 3 |
| 4 |
| 4 |
| 5 |
| 3 |
| 4 |
| 4 |
| 5 |
| 4 |
| 5 |
| 3 |
| 4 |
| 4 |
| 5 |
| 4 |
| 5 |
| 3 |
| 4 |
| 4 |
| 5 |
x=
| 3 |
| 4 |
| 5 |
| 4 |
x=
| 15 |
| 16 |
(2)
| 8 |
| 5 |
| 8 |
| 5 |
| 8 |
| 5 |
| 8 |
| 5 |
| 8 |
| 5 |
| 8 |
| 5 |
x=32×
| 5 |
| 8 |
x=20;
(3)5-
| 5 |
| 8 |
5-
| 5 |
| 8 |
| 5 |
| 8 |
| 5 |
| 8 |
3+
| 5 |
| 8 |
3+
| 5 |
| 8 |
| 5 |
| 8 |
| 5 |
| 8 |
| 5 |
| 8 |
| 5 |
| 8 |
x=2×
| 8 |
| 5 |
x=
| 16 |
| 5 |
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