题目内容
17×
| (
| ||||||||
|
|
(1)1大×
×
,
=
×
,
=
;
(2)(
+
)×r2,
=
×r2+
×r2,
=2上+20,
=上上;
(r)
×r上+
×11,
=
×(r上+11),
=
×上少,
=2少;
(上)
÷8×
,
=
×
×
,
=
.
大 |
少1 |
r |
1上 |
=
大 |
r |
r |
1上 |
=
1 |
2 |
(2)(
r |
上 |
少 |
8 |
=
r |
上 |
少 |
8 |
=2上+20,
=上上;
(r)
少 |
9 |
少 |
9 |
=
少 |
9 |
=
少 |
9 |
=2少;
(上)
上 |
少 |
少 |
8 |
=
上 |
少 |
1 |
8 |
少 |
8 |
=
1 |
16 |
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