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©2024 数学クラブ http://sugaku.club/
月 日（ ）
● 有理化しなさい
[1P0-00]
(1)
1
17
(2)
1
19
(3)
1
13
(4)
1
13
(5)
1
5
(6)
1
2
(7)
1
7
(8)
1
13
(9)
1
11
(10)
1
13
(11)
1
13
(12)
1
19
(13)
1
3
(14)
1
7
©2024 数学クラブ http://sugaku.club/
月 日（ ）
【解答例】
(1)
1
17
17
1
×
17
=
=
17
17
×
17
(2)
1
19
19
1
×
19
=
=
19
19
×
19
(3)
1
13
13
1
×
13
=
=
13
13
×
13
(4)
1
13
13
1
×
13
=
=
13
13
×
13
(5)
1
5
5
1
×
5
=
=
5
5
×
5
(6)
1
2
2
1
×
2
=
=
2
2
×
2
(7)
1
7
7
1
×
7
=
=
7
7
×
7
(8)
1
13
13
1
×
13
=
=
13
13
×
13
(9)
1
11
11
1
×
11
=
=
11
11
×
11
(10)
1
13
13
1
×
13
=
=
13
13
×
13
(11)
1
13
13
1
×
13
=
=
13
13
×
13
(12)
1
19
19
1
×
19
=
=
19
19
×
19
(13)
1
3
3
1
×
3
=
=
3
3
×
3
(14)
1
7
7
1
×
7
=
=
7
7
×
7