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▲
©2025 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)
200
(2)
500
(3)
20
(4)
175
(5)
112
(6)
128
(7)
245
(8)
18
(9)
147
(10)
8
(11)
180
(12)
8
©2025 数学クラブ http://sugaku.club/
月 日( )
【解答例】
(1)
200
2
10
×
2
2
=
=
10
(2)
500
2
10
×
5
5
=
=
10
(3)
20
2
2
×
5
5
=
=
2
(4)
175
2
5
×
7
7
=
=
5
(5)
112
2
4
×
7
7
=
=
4
(6)
128
2
8
×
2
2
=
=
8
(7)
245
2
7
×
5
5
=
=
7
(8)
18
2
3
×
2
2
=
=
3
(9)
147
2
7
×
3
3
=
=
7
(10)
8
2
2
×
2
2
=
=
2
(11)
180
2
6
×
5
5
=
=
6
(12)
8
2
2
×
2
2
=
=
2
(1)
2
10
(2)
5
10
(3)
5
2
(4)
7
5
(5)
7
4
(6)
2
8
(7)
5
7
(8)
2
3
(9)
3
7
(10)
2
2
(11)
5
6
(12)
2
2