［文字サイズの変更］
▼
▲
©2024 数学クラブ http://sugaku.club/
月 日（ ）
● 有理化しなさい
[1P1-00]
(1)
17
23
(2)
3
7
(3)
23
13
(4)
19
3
(5)
17
19
(6)
2
19
(7)
5
7
(8)
19
3
(9)
19
11
(10)
7
3
(11)
23
2
(12)
19
23
(13)
5
3
(14)
13
5
©2024 数学クラブ http://sugaku.club/
月 日（ ）
【解答例】
(1)
17
23
17
23
×
391
=
=
23
23
×
23
(2)
3
7
3
7
×
21
=
=
7
7
×
7
(3)
23
13
23
13
×
299
=
=
13
13
×
13
(4)
19
3
19
3
×
57
=
=
3
3
×
3
(5)
17
19
17
19
×
323
=
=
19
19
×
19
(6)
2
19
2
19
×
38
=
=
19
19
×
19
(7)
5
7
5
7
×
35
=
=
7
7
×
7
(8)
19
3
19
3
×
57
=
=
3
3
×
3
(9)
19
11
19
11
×
209
=
=
11
11
×
11
(10)
7
3
7
3
×
21
=
=
3
3
×
3
(11)
23
2
23
2
×
46
=
=
2
2
×
2
(12)
19
23
19
23
×
437
=
=
23
23
×
23
(13)
5
3
5
3
×
15
=
=
3
3
×
3
(14)
13
5
13
5
×
65
=
=
5
5
×
5