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©2018 数学クラブ http://sugaku.club/
月 日（ ）
● 有理化しなさい
[1P1-00]
(1)
17
11
(2)
13
23
(3)
11
2
(4)
11
2
(5)
19
7
(6)
13
2
(7)
3
17
(8)
17
3
(9)
7
11
(10)
3
13
(11)
11
23
(12)
5
11
(13)
2
3
(14)
19
3
©2018 数学クラブ http://sugaku.club/
月 日（ ）
【解答例】
(1)
17
11
17
11
×
187
=
=
11
11
×
11
(2)
13
23
13
23
×
299
=
=
23
23
×
23
(3)
11
2
11
2
×
22
=
=
2
2
×
2
(4)
11
2
11
2
×
22
=
=
2
2
×
2
(5)
19
7
19
7
×
133
=
=
7
7
×
7
(6)
13
2
13
2
×
26
=
=
2
2
×
2
(7)
3
17
3
17
×
51
=
=
17
17
×
17
(8)
17
3
17
3
×
51
=
=
3
3
×
3
(9)
7
11
7
11
×
77
=
=
11
11
×
11
(10)
3
13
3
13
×
39
=
=
13
13
×
13
(11)
11
23
11
23
×
253
=
=
23
23
×
23
(12)
5
11
5
11
×
55
=
=
11
11
×
11
(13)
2
3
2
3
×
6
=
=
3
3
×
3
(14)
19
3
19
3
×
57
=
=
3
3
×
3