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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)
x
+
0.5
:
3.4
=
−0.7
:
−1.19
(2)
0.56
:
0.4
x
=
7
:
−6.5
(3)
x
+
0.6
:
0.32
=
−1.5
:
−0.4
(4)
−1.7
x
:
2.72
=
−3
:
−8
(5)
2.2
:
x
+
2.1
=
11
:
−2
(6)
−11
:
−2.2
=
−2.75
:
0.5
x
(7)
1.5
x
:
−1.5
=
0.9
:
9
(8)
−1.2
:
2.1
=
−4.2
:
2.1
x
(9)
−0.7
:
1
=
1.12
:
x
+
0.7
(10)
1.8
:
0.1
=
−2.2
x
:
−1.1
(11)
2
x
:
13
=
−2.2
:
1.3
(12)
1.4
:
7
=
1.7
:
x
−
0.6
(13)
−4.55
:
1.3
x
=
−0.7
:
−1.6
(14)
−1.4
:
1.1
=
−7
:
x
−
1.4
(15)
−10.45
:
−1.1
x
=
1.9
:
−0.6
(16)
−0.9
:
0.9
=
−1
:
x
+
1.2
©2025 数学クラブ http://sugaku.club/
月 日( )
【解答例】
(1)
x
+
0.5
:
3.4
=
−0.7
:
−1.19
−1.19
×
(
x
+
0.5
)
=
3.4
×
(
−0.7
)
x
+
0.5
=
2
x
=
1.5
(2)
0.56
:
0.4
x
=
7
:
−6.5
7
×
0.4
x
=
0.56
×
(
−6.5
)
x
=
−1.3
(3)
x
+
0.6
:
0.32
=
−1.5
:
−0.4
−0.4
×
(
x
+
0.6
)
=
0.32
×
(
−1.5
)
x
+
0.6
=
1.2
x
=
0.6
(4)
−1.7
x
:
2.72
=
−3
:
−8
−8
×
(
−1.7
)
x
=
2.72
×
(
−3
)
x
=
−0.6
(5)
2.2
:
x
+
2.1
=
11
:
−2
11
×
(
x
+
2.1
)
=
2.2
×
(
−2
)
x
+
2.1
=
−0.4
x
=
−2.5
(6)
−11
:
−2.2
=
−2.75
:
0.5
x
−11
×
0.5
x
=
−2.2
×
(
−2.75
)
x
=
−1.1
(7)
1.5
x
:
−1.5
=
0.9
:
9
9
×
1.5
x
=
−1.5
×
0.9
x
=
−0.1
(8)
−1.2
:
2.1
=
−4.2
:
2.1
x
−1.2
×
2.1
x
=
2.1
×
(
−4.2
)
x
=
3.5
(9)
−0.7
:
1
=
1.12
:
x
+
0.7
−0.7
×
(
x
+
0.7
)
=
1.12
x
+
0.7
=
−1.6
x
=
−2.3
(10)
1.8
:
0.1
=
−2.2
x
:
−1.1
0.1
×
(
−2.2
)
x
=
1.8
×
(
−1.1
)
x
=
9
(11)
2
x
:
13
=
−2.2
:
1.3
1.3
×
2
x
=
13
×
(
−2.2
)
x
=
−11
(12)
1.4
:
7
=
1.7
:
x
−
0.6
1.4
×
(
x
−
0.6
)
=
7
×
1.7
x
−
0.6
=
8.5
x
=
9.1
(13)
−4.55
:
1.3
x
=
−0.7
:
−1.6
−0.7
×
1.3
x
=
−4.55
×
(
−1.6
)
x
=
−8
(14)
−1.4
:
1.1
=
−7
:
x
−
1.4
−1.4
×
(
x
−
1.4
)
=
1.1
×
(
−7
)
x
−
1.4
=
5.5
x
=
6.9
(15)
−10.45
:
−1.1
x
=
1.9
:
−0.6
1.9
×
(
−1.1
)
x
=
−10.45
×
(
−0.6
)
x
=
−3
(16)
−0.9
:
0.9
=
−1
:
x
+
1.2
−0.9
×
(
x
+
1.2
)
=
0.9
×
(
−1
)
x
+
1.2
=
1
x
=
−0.2