[文字サイズの変更]
▼
▲
©2025 数学クラブ http://sugaku.club/
月 日( )
● 次の比例式を解きなさい
[0G1-10]
(1)
4.5
:
x
−
1.1
=
−3
:
−0.6
(2)
−1
:
8
=
−0.36
:
1.8
x
(3)
2.1
x
:
1.47
=
1
:
1.4
(4)
2
:
0.1
=
x
−
0.9
:
0.21
(5)
−0.1
:
−0.12
=
−1.3
x
:
−1.56
(6)
−9
:
x
+
1.1
=
−1
:
−0.2
(7)
x
+
1.7
:
−0.6
=
−4
:
−3
(8)
1.3
:
−1
=
x
−
0.5
:
0.4
(9)
−1.6
:
1
=
x
−
0.5
:
−1.2
(10)
x
−
0.2
:
1.52
=
−1
:
0.8
(11)
0.3
:
1
=
0.9
:
x
+
1.7
(12)
2.31
:
−1.1
=
−1.5
x
:
1.5
(13)
1.1
:
5.5
=
−1.2
:
x
−
0.2
(14)
1.7
:
−0.3
=
5.1
:
0.3
x
(15)
1.7
:
0.1
x
=
3
:
0.3
(16)
4.5
:
7
=
0.9
:
x
−
2.2
©2025 数学クラブ http://sugaku.club/
月 日( )
【解答例】
(1)
4.5
:
x
−
1.1
=
−3
:
−0.6
−3
×
(
x
−
1.1
)
=
4.5
×
(
−0.6
)
x
−
1.1
=
0.9
x
=
2
(2)
−1
:
8
=
−0.36
:
1.8
x
−
1.8
x
=
8
×
(
−0.36
)
x
=
1.6
(3)
2.1
x
:
1.47
=
1
:
1.4
1.4
×
2.1
x
=
1.47
x
=
0.5
(4)
2
:
0.1
=
x
−
0.9
:
0.21
0.1
×
(
x
−
0.9
)
=
2
×
0.21
x
−
0.9
=
4.2
x
=
5.1
(5)
−0.1
:
−0.12
=
−1.3
x
:
−1.56
−0.12
×
(
−1.3
)
x
=
−0.1
×
(
−1.56
)
x
=
1
(6)
−9
:
x
+
1.1
=
−1
:
−0.2
−
(
x
+
1.1
)
=
−9
×
(
−0.2
)
x
+
1.1
=
−1.8
x
=
−2.9
(7)
x
+
1.7
:
−0.6
=
−4
:
−3
−3
×
(
x
+
1.7
)
=
−0.6
×
(
−4
)
x
+
1.7
=
−0.8
x
=
−2.5
(8)
1.3
:
−1
=
x
−
0.5
:
0.4
−
(
x
−
0.5
)
=
1.3
×
0.4
x
−
0.5
=
−0.52
x
=
−0.02
(9)
−1.6
:
1
=
x
−
0.5
:
−1.2
x
−
0.5
=
−1.6
×
(
−1.2
)
x
−
0.5
=
1.92
x
=
2.42
(10)
x
−
0.2
:
1.52
=
−1
:
0.8
0.8
×
(
x
−
0.2
)
=
1.52
×
(
−1
)
x
−
0.2
=
−1.9
x
=
−1.7
(11)
0.3
:
1
=
0.9
:
x
+
1.7
0.3
×
(
x
+
1.7
)
=
0.9
x
+
1.7
=
3
x
=
1.3
(12)
2.31
:
−1.1
=
−1.5
x
:
1.5
−1.1
×
(
−1.5
)
x
=
2.31
×
1.5
x
=
2.1
(13)
1.1
:
5.5
=
−1.2
:
x
−
0.2
1.1
×
(
x
−
0.2
)
=
5.5
×
(
−1.2
)
x
−
0.2
=
−6
x
=
−5.8
(14)
1.7
:
−0.3
=
5.1
:
0.3
x
1.7
×
0.3
x
=
−0.3
×
5.1
x
=
−3
(15)
1.7
:
0.1
x
=
3
:
0.3
3
×
0.1
x
=
1.7
×
0.3
x
=
1.7
(16)
4.5
:
7
=
0.9
:
x
−
2.2
4.5
×
(
x
−
2.2
)
=
7
×
0.9
x
−
2.2
=
1.4
x
=
3.6