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©2024 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
:
4
=
1
:
2
(2)
−4
:
x
=
−12
:
−3
(3)
6
:
3
=
−2
:
x
(4)
x
:
−15
=
4
:
−12
(5)
2
:
−10
=
−3
:
x
(6)
x
:
−3
=
−15
:
3
(7)
−4
:
x
=
6
:
3
(8)
−5
:
−20
=
x
:
−16
(9)
x
:
20
=
−3
:
12
(10)
4
:
x
=
−3
:
12
(11)
x
:
−8
=
1
:
−4
(12)
2
:
1
=
−2
:
x
(13)
x
:
−2
=
2
:
−4
(14)
5
:
x
=
−25
:
−20
(15)
−6
:
15
=
x
:
5
(16)
−5
:
1
=
−10
:
x
©2024 数学クラブ http://sugaku.club/
月 日( )
【解答例】
(1)
x
:
4
=
1
:
2
2
x
=
4
x
=
2
(2)
−4
:
x
=
−12
:
−3
−12
x
=
−4
×
(
−3
)
x
=
−1
(3)
6
:
3
=
−2
:
x
6
x
=
3
×
(
−2
)
x
=
−1
(4)
x
:
−15
=
4
:
−12
−12
x
=
−15
×
4
x
=
5
(5)
2
:
−10
=
−3
:
x
2
x
=
−10
×
(
−3
)
x
=
15
(6)
x
:
−3
=
−15
:
3
3
x
=
−3
×
(
−15
)
x
=
15
(7)
−4
:
x
=
6
:
3
6
x
=
−4
×
3
x
=
−2
(8)
−5
:
−20
=
x
:
−16
−20
x
=
−5
×
(
−16
)
x
=
−4
(9)
x
:
20
=
−3
:
12
12
x
=
20
×
(
−3
)
x
=
−5
(10)
4
:
x
=
−3
:
12
−3
x
=
4
×
12
x
=
−16
(11)
x
:
−8
=
1
:
−4
−4
x
=
−8
x
=
2
(12)
2
:
1
=
−2
:
x
2
x
=
−2
x
=
−1
(13)
x
:
−2
=
2
:
−4
−4
x
=
−2
×
2
x
=
1
(14)
5
:
x
=
−25
:
−20
−25
x
=
5
×
(
−20
)
x
=
4
(15)
−6
:
15
=
x
:
5
15
x
=
−6
×
5
x
=
−2
(16)
−5
:
1
=
−10
:
x
−5
x
=
−10
x
=
2