[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)
4
:
16
=
−3
:
x
(2)
4
:
12
=
x
:
−3
(3)
x
:
1
=
4
:
−1
(4)
−5
:
5
=
x
:
−3
(5)
−4
:
x
=
−2
:
2
(6)
2
:
4
=
3
:
x
(7)
2
:
3
=
x
:
−12
(8)
x
:
5
=
2
:
−1
(9)
3
:
−12
=
−2
:
x
(10)
5
:
−5
=
x
:
2
(11)
3
:
x
=
4
:
−4
(12)
−5
:
x
=
5
:
1
(13)
25
:
−20
=
−5
:
x
(14)
x
:
−4
=
3
:
−1
(15)
−4
:
−10
=
x
:
5
(16)
4
:
−4
=
x
:
−1
©2026 数学クラブ http://sugaku.club/
月 日( )
【解答例】
(1)
4
:
16
=
−3
:
x
4
x
=
16
×
(
−3
)
x
=
−12
(2)
4
:
12
=
x
:
−3
12
x
=
4
×
(
−3
)
x
=
−1
(3)
x
:
1
=
4
:
−1
−
x
=
4
x
=
−4
(4)
−5
:
5
=
x
:
−3
5
x
=
−5
×
(
−3
)
x
=
3
(5)
−4
:
x
=
−2
:
2
−2
x
=
−4
×
2
x
=
4
(6)
2
:
4
=
3
:
x
2
x
=
4
×
3
x
=
6
(7)
2
:
3
=
x
:
−12
3
x
=
2
×
(
−12
)
x
=
−8
(8)
x
:
5
=
2
:
−1
−
x
=
5
×
2
x
=
−10
(9)
3
:
−12
=
−2
:
x
3
x
=
−12
×
(
−2
)
x
=
8
(10)
5
:
−5
=
x
:
2
−5
x
=
5
×
2
x
=
−2
(11)
3
:
x
=
4
:
−4
4
x
=
3
×
(
−4
)
x
=
−3
(12)
−5
:
x
=
5
:
1
5
x
=
−5
x
=
−1
(13)
25
:
−20
=
−5
:
x
25
x
=
−20
×
(
−5
)
x
=
4
(14)
x
:
−4
=
3
:
−1
−
x
=
−4
×
3
x
=
12
(15)
−4
:
−10
=
x
:
5
−10
x
=
−4
×
5
x
=
2
(16)
4
:
−4
=
x
:
−1
−4
x
=
4
×
(
−1
)
x
=
1