[文字サイズの変更]
▼
▲
©2025 数学クラブ http://sugaku.club/
月 日( )
● √
a
の形に変形しなさい
[1N2-00]
(1)
2
−
7
(2)
5
7
(3)
5
−
3
(4)
5
6
(5)
2
−
5
(6)
5
5
(7)
7
10
(8)
2
10
×
(
−
)
(9)
5
7
(10)
2
10
(11)
5
10
(12)
3
6
©2025 数学クラブ http://sugaku.club/
月 日( )
【解答例】
(1)
2
−
7
2
2
7
2
49
=
−
=
−
(2)
5
7
2
7
×
5
=
245
=
(3)
5
−
3
5
2
3
5
9
=
−
=
−
(4)
5
6
2
6
×
5
=
180
=
(5)
2
−
5
2
2
5
2
25
=
−
=
−
(6)
5
5
2
5
×
5
=
125
=
(7)
7
10
7
2
10
7
100
=
=
(8)
2
10
×
(
−
)
2
10
×
2
=
−
200
=
−
(9)
5
7
2
7
×
5
=
245
=
(10)
2
10
2
2
10
1
50
=
=
(11)
5
10
2
10
×
5
=
500
=
(12)
3
6
3
2
6
1
12
=
=
(1)
2
49
−
(2)
245
(3)
5
9
−
(4)
180
(5)
2
25
−
(6)
125
(7)
7
100
(8)
200
−
(9)
245
(10)
1
50
(11)
500
(12)
1
12