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©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)
−0.56
:
1.4
x
=
1.1
:
5.5
(2)
−0.6
:
0.48
=
−0.1
x
:
0.16
(3)
2
:
x
+
2
=
3.2
:
1.76
(4)
1.2
:
3
=
0.8
:
x
−
0.4
(5)
11
:
1.1
=
x
+
1.1
:
−0.1
(6)
−6
:
x
+
0.3
=
−1.2
:
1.1
(7)
3.4
:
1.7
=
6
:
2
x
(8)
−0.9
:
−1.62
=
x
−
1.3
:
−3.6
(9)
1.8
:
9
=
1.6
:
x
−
1.6
(10)
−0.7
:
−1.4
=
x
+
0.5
:
3
(11)
−0.11
:
−0.1
=
0.44
:
−0.4
x
(12)
−1.68
:
0.7
=
−1.2
:
x
+
2.2
(13)
x
+
1.7
:
−0.6
=
3
:
−3
(14)
0.3
:
1.9
=
x
−
0.3
:
19
(15)
1.8
:
−1
=
x
+
1.1
:
−0.5
(16)
1.4
:
0.7
=
−1.4
:
1.4
x
©2025 数学クラブ http://sugaku.club/
月 日( )
【解答例】
(1)
−0.56
:
1.4
x
=
1.1
:
5.5
1.1
×
1.4
x
=
−0.56
×
5.5
x
=
−2
(2)
−0.6
:
0.48
=
−0.1
x
:
0.16
0.48
×
(
−0.1
)
x
=
−0.6
×
0.16
x
=
2
(3)
2
:
x
+
2
=
3.2
:
1.76
3.2
×
(
x
+
2
)
=
2
×
1.76
x
+
2
=
1.1
x
=
−0.9
(4)
1.2
:
3
=
0.8
:
x
−
0.4
1.2
×
(
x
−
0.4
)
=
3
×
0.8
x
−
0.4
=
2
x
=
2.4
(5)
11
:
1.1
=
x
+
1.1
:
−0.1
1.1
×
(
x
+
1.1
)
=
11
×
(
−0.1
)
x
+
1.1
=
−1
x
=
−2.1
(6)
−6
:
x
+
0.3
=
−1.2
:
1.1
−1.2
×
(
x
+
0.3
)
=
−6
×
1.1
x
+
0.3
=
5.5
x
=
5.2
(7)
3.4
:
1.7
=
6
:
2
x
3.4
×
2
x
=
1.7
×
6
x
=
1.5
(8)
−0.9
:
−1.62
=
x
−
1.3
:
−3.6
−1.62
×
(
x
−
1.3
)
=
−0.9
×
(
−3.6
)
x
−
1.3
=
−2
x
=
−0.7
(9)
1.8
:
9
=
1.6
:
x
−
1.6
1.8
×
(
x
−
1.6
)
=
9
×
1.6
x
−
1.6
=
8
x
=
9.6
(10)
−0.7
:
−1.4
=
x
+
0.5
:
3
−1.4
×
(
x
+
0.5
)
=
−0.7
×
3
x
+
0.5
=
1.5
x
=
1
(11)
−0.11
:
−0.1
=
0.44
:
−0.4
x
−0.11
×
(
−0.4
)
x
=
−0.1
×
0.44
x
=
−1
(12)
−1.68
:
0.7
=
−1.2
:
x
+
2.2
−1.68
×
(
x
+
2.2
)
=
0.7
×
(
−1.2
)
x
+
2.2
=
0.5
x
=
−1.7
(13)
x
+
1.7
:
−0.6
=
3
:
−3
−3
×
(
x
+
1.7
)
=
−0.6
×
3
x
+
1.7
=
0.6
x
=
−1.1
(14)
0.3
:
1.9
=
x
−
0.3
:
19
1.9
×
(
x
−
0.3
)
=
0.3
×
19
x
−
0.3
=
3
x
=
3.3
(15)
1.8
:
−1
=
x
+
1.1
:
−0.5
−
(
x
+
1.1
)
=
1.8
×
(
−0.5
)
x
+
1.1
=
0.9
x
=
−0.2
(16)
1.4
:
0.7
=
−1.4
:
1.4
x
1.4
×
1.4
x
=
0.7
×
(
−1.4
)
x
=
−0.5