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▲
©2026 数学クラブ http://sugaku.club/
月 日( )
● √
の中をできるだけ簡単な数にしなさい
[1N3-00]
(1)
32
(2)
147
(3)
405
(4)
567
(5)
125
(6)
162
(7)
180
(8)
200
(9)
72
(10)
63
(11)
128
(12)
245
©2026 数学クラブ http://sugaku.club/
月 日( )
【解答例】
(1)
32
2
4
×
2
2
=
=
4
(2)
147
2
7
×
3
3
=
=
7
(3)
405
2
9
×
5
5
=
=
9
(4)
567
2
9
×
7
7
=
=
9
(5)
125
2
5
×
5
5
=
=
5
(6)
162
2
9
×
2
2
=
=
9
(7)
180
2
6
×
5
5
=
=
6
(8)
200
2
10
×
2
2
=
=
10
(9)
72
2
6
×
2
2
=
=
6
(10)
63
2
3
×
7
7
=
=
3
(11)
128
2
8
×
2
2
=
=
8
(12)
245
2
7
×
5
5
=
=
7
(1)
2
4
(2)
3
7
(3)
5
9
(4)
7
9
(5)
5
5
(6)
2
9
(7)
5
6
(8)
2
10
(9)
2
6
(10)
7
3
(11)
2
8
(12)
5
7