[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)
3
:
−6
=
x
:
−2
(2)
−12
:
x
=
15
:
5
(3)
−1
:
4
=
x
:
−20
(4)
−4
:
−8
=
−1
:
x
(5)
−15
:
x
=
5
:
4
(6)
x
:
−4
=
5
:
20
(7)
x
:
−4
=
3
:
−2
(8)
1
:
x
=
2
:
4
(9)
−1
:
1
=
x
:
−4
(10)
x
:
3
=
−4
:
−6
(11)
8
:
x
=
−12
:
−3
(12)
x
:
−1
=
20
:
−5
(13)
−10
:
5
=
2
:
x
(14)
4
:
x
=
−1
:
−3
(15)
5
:
x
=
10
:
2
(16)
−4
:
−1
=
4
:
x
©2026 数学クラブ http://sugaku.club/
月 日( )
【解答例】
(1)
3
:
−6
=
x
:
−2
−6
x
=
3
×
(
−2
)
x
=
1
(2)
−12
:
x
=
15
:
5
15
x
=
−12
×
5
x
=
−4
(3)
−1
:
4
=
x
:
−20
4
x
=
−
(
−20
)
x
=
5
(4)
−4
:
−8
=
−1
:
x
−4
x
=
−8
×
(
−1
)
x
=
−2
(5)
−15
:
x
=
5
:
4
5
x
=
−15
×
4
x
=
−12
(6)
x
:
−4
=
5
:
20
20
x
=
−4
×
5
x
=
−1
(7)
x
:
−4
=
3
:
−2
−2
x
=
−4
×
3
x
=
6
(8)
1
:
x
=
2
:
4
2
x
=
4
x
=
2
(9)
−1
:
1
=
x
:
−4
x
=
−
(
−4
)
x
=
4
(10)
x
:
3
=
−4
:
−6
−6
x
=
3
×
(
−4
)
x
=
2
(11)
8
:
x
=
−12
:
−3
−12
x
=
8
×
(
−3
)
x
=
2
(12)
x
:
−1
=
20
:
−5
−5
x
=
−
20
x
=
4
(13)
−10
:
5
=
2
:
x
−10
x
=
5
×
2
x
=
−1
(14)
4
:
x
=
−1
:
−3
−
x
=
4
×
(
−3
)
x
=
12
(15)
5
:
x
=
10
:
2
10
x
=
5
×
2
x
=
1
(16)
−4
:
−1
=
4
:
x
−4
x
=
−
4
x
=
1