[文字サイズの変更]
▼
▲
©2026 数学クラブ http://sugaku.club/
月 日( )
● 次の比例式を解きなさい
[0G0-00]
(1)
x
:
−6
=
−5
:
10
(2)
−4
:
−16
=
x
:
4
(3)
x
:
−9
=
5
:
−15
(4)
3
:
−2
=
−15
:
x
(5)
5
:
1
=
x
:
−1
(6)
−4
:
2
=
2
:
x
(7)
x
:
1
=
−8
:
−4
(8)
4
:
20
=
1
:
x
(9)
−1
:
5
=
x
:
−5
(10)
12
:
8
=
x
:
−2
(11)
x
:
−5
=
25
:
5
(12)
5
:
x
=
25
:
−25
(13)
2
:
−6
=
1
:
x
(14)
−8
:
12
=
x
:
3
(15)
5
:
3
=
−20
:
x
(16)
−3
:
x
=
9
:
−6
©2026 数学クラブ http://sugaku.club/
月 日( )
【解答例】
(1)
x
:
−6
=
−5
:
10
10
x
=
−6
×
(
−5
)
x
=
3
(2)
−4
:
−16
=
x
:
4
−16
x
=
−4
×
4
x
=
1
(3)
x
:
−9
=
5
:
−15
−15
x
=
−9
×
5
x
=
3
(4)
3
:
−2
=
−15
:
x
3
x
=
−2
×
(
−15
)
x
=
10
(5)
5
:
1
=
x
:
−1
x
=
5
×
(
−1
)
x
=
−5
(6)
−4
:
2
=
2
:
x
−4
x
=
2
×
2
x
=
−1
(7)
x
:
1
=
−8
:
−4
−4
x
=
−8
x
=
2
(8)
4
:
20
=
1
:
x
4
x
=
20
x
=
5
(9)
−1
:
5
=
x
:
−5
5
x
=
−
(
−5
)
x
=
1
(10)
12
:
8
=
x
:
−2
8
x
=
12
×
(
−2
)
x
=
−3
(11)
x
:
−5
=
25
:
5
5
x
=
−5
×
25
x
=
−25
(12)
5
:
x
=
25
:
−25
25
x
=
5
×
(
−25
)
x
=
−5
(13)
2
:
−6
=
1
:
x
2
x
=
−6
x
=
−3
(14)
−8
:
12
=
x
:
3
12
x
=
−8
×
3
x
=
−2
(15)
5
:
3
=
−20
:
x
5
x
=
3
×
(
−20
)
x
=
−12
(16)
−3
:
x
=
9
:
−6
9
x
=
−3
×
(
−6
)
x
=
2