[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)
0.45
:
0.3
x
=
−0.6
:
−1.2
(2)
−0.6
:
−1.2
=
−1.7
x
:
−3.4
(3)
11.7
:
−1.3
x
=
−2
:
−0.4
(4)
−0.6
:
−0.2
=
−0.3
:
0.1
x
(5)
0.2
:
1
=
x
−
0.7
:
−6
(6)
−1.3
:
−6.5
=
x
+
1.9
:
6
(7)
2
:
−2.2
=
−1.6
:
x
+
0.9
(8)
0.44
:
−0.4
x
=
−11
:
21
(9)
−19
:
−1.9
=
x
−
0.1
:
1.3
(10)
−0.6
:
−0.9
=
2.6
:
−1.3
x
(11)
x
+
1.8
:
1.4
=
−9.5
:
−1.9
(12)
11
:
3
=
0.6
x
:
0.18
(13)
1.44
:
x
−
1
=
−0.8
:
−1
(14)
−0.6
:
−3
=
−0.63
:
2.1
x
(15)
−1.7
:
0.6
=
2.1
x
:
6.3
(16)
−0.2
:
−1
=
0.48
:
1.2
x
©2025 数学クラブ http://sugaku.club/
月 日( )
【解答例】
(1)
0.45
:
0.3
x
=
−0.6
:
−1.2
−0.6
×
0.3
x
=
0.45
×
(
−1.2
)
x
=
3
(2)
−0.6
:
−1.2
=
−1.7
x
:
−3.4
−1.2
×
(
−1.7
)
x
=
−0.6
×
(
−3.4
)
x
=
1
(3)
11.7
:
−1.3
x
=
−2
:
−0.4
−2
×
(
−1.3
)
x
=
11.7
×
(
−0.4
)
x
=
−1.8
(4)
−0.6
:
−0.2
=
−0.3
:
0.1
x
−0.6
×
0.1
x
=
−0.2
×
(
−0.3
)
x
=
−1
(5)
0.2
:
1
=
x
−
0.7
:
−6
x
−
0.7
=
0.2
×
(
−6
)
x
−
0.7
=
−1.2
x
=
−0.5
(6)
−1.3
:
−6.5
=
x
+
1.9
:
6
−6.5
×
(
x
+
1.9
)
=
−1.3
×
6
x
+
1.9
=
1.2
x
=
−0.7
(7)
2
:
−2.2
=
−1.6
:
x
+
0.9
2
×
(
x
+
0.9
)
=
−2.2
×
(
−1.6
)
x
+
0.9
=
1.76
x
=
0.86
(8)
0.44
:
−0.4
x
=
−11
:
21
−11
×
(
−0.4
)
x
=
0.44
×
21
x
=
2.1
(9)
−19
:
−1.9
=
x
−
0.1
:
1.3
−1.9
×
(
x
−
0.1
)
=
−19
×
1.3
x
−
0.1
=
13
x
=
13.1
(10)
−0.6
:
−0.9
=
2.6
:
−1.3
x
−0.6
×
(
−1.3
)
x
=
−0.9
×
2.6
x
=
−3
(11)
x
+
1.8
:
1.4
=
−9.5
:
−1.9
−1.9
×
(
x
+
1.8
)
=
1.4
×
(
−9.5
)
x
+
1.8
=
7
x
=
5.2
(12)
11
:
3
=
0.6
x
:
0.18
3
×
0.6
x
=
11
×
0.18
x
=
1.1
(13)
1.44
:
x
−
1
=
−0.8
:
−1
−0.8
×
(
x
−
1
)
=
1.44
×
(
−1
)
x
−
1
=
1.8
x
=
2.8
(14)
−0.6
:
−3
=
−0.63
:
2.1
x
−0.6
×
2.1
x
=
−3
×
(
−0.63
)
x
=
−1.5
(15)
−1.7
:
0.6
=
2.1
x
:
6.3
0.6
×
2.1
x
=
−1.7
×
6.3
x
=
−8.5
(16)
−0.2
:
−1
=
0.48
:
1.2
x
−0.2
×
1.2
x
=
−
0.48
x
=
2