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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)
175
(2)
12
(3)
700
(4)
98
(5)
50
(6)
405
(7)
567
(8)
50
(9)
128
(10)
245
(11)
18
(12)
175
©2026 数学クラブ http://sugaku.club/
月 日( )
【解答例】
(1)
175
2
5
×
7
7
=
=
5
(2)
12
2
2
×
3
3
=
=
2
(3)
700
2
10
×
7
7
=
=
10
(4)
98
2
7
×
2
2
=
=
7
(5)
50
2
5
×
2
2
=
=
5
(6)
405
2
9
×
5
5
=
=
9
(7)
567
2
9
×
7
7
=
=
9
(8)
50
2
5
×
2
2
=
=
5
(9)
128
2
8
×
2
2
=
=
8
(10)
245
2
7
×
5
5
=
=
7
(11)
18
2
3
×
2
2
=
=
3
(12)
175
2
5
×
7
7
=
=
5
(1)
7
5
(2)
3
2
(3)
7
10
(4)
2
7
(5)
2
5
(6)
5
9
(7)
7
9
(8)
2
5
(9)
2
8
(10)
5
7
(11)
2
3
(12)
7
5