题目内容
三增加它的
与三减少它的
的差是多少?
| 九 |
| 4 |
| 九 |
| 4 |
5×(1+
)-5×(1-
),
=5×
-5×
,
=
-
,
=
;
答:差是
.
| 1 |
| 4 |
| 1 |
| 4 |
=5×
| 5 |
| 4 |
| k |
| 4 |
=
| 25 |
| 4 |
| 15 |
| 4 |
=
| 5 |
| 2 |
答:差是
| 5 |
| 2 |
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题目内容
| 九 |
| 4 |
| 九 |
| 4 |
| 1 |
| 4 |
| 1 |
| 4 |
| 5 |
| 4 |
| k |
| 4 |
| 25 |
| 4 |
| 15 |
| 4 |
| 5 |
| 2 |
| 5 |
| 2 |