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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
[0G1-10]
(1)
7
:
x
−
1.4
=
−8
:
−1.6
(2)
−1.3
:
−1.1
=
−13
:
x
−
0.1
(3)
1
:
1.7
=
−1.2
x
:
2.04
(4)
x
−
0.1
:
−1.6
=
4.5
:
0.9
(5)
0.7
:
1.3
=
7
:
x
−
2
(6)
−0.6
:
−0.3
=
−3
:
x
−
1.7
(7)
2.2
:
11
=
1.6
:
x
+
1.6
(8)
−3
:
−0.3
=
−13
:
x
−
2.2
(9)
x
+
1.2
:
1
=
1.6
:
2
(10)
1.8
x
:
3.06
=
−3.6
:
−2
(11)
1.7
x
:
3.06
=
0.5
:
1
(12)
−1.5
:
−3
=
−0.4
:
−0.8
x
(13)
x
+
1.3
:
6.5
=
−0.2
:
1.3
(14)
0.4
:
−0.04
=
x
−
0.5
:
0.2
(15)
0.2
:
−1
=
x
+
1.2
:
−0.5
(16)
−2.2
:
1
=
2.31
:
−2.1
x
©2024 数学クラブ http://sugaku.club/
月 日( )
【解答例】
(1)
7
:
x
−
1.4
=
−8
:
−1.6
−8
×
(
x
−
1.4
)
=
7
×
(
−1.6
)
x
−
1.4
=
1.4
x
=
2.8
(2)
−1.3
:
−1.1
=
−13
:
x
−
0.1
−1.3
×
(
x
−
0.1
)
=
−1.1
×
(
−13
)
x
−
0.1
=
−11
x
=
−10.9
(3)
1
:
1.7
=
−1.2
x
:
2.04
1.7
×
(
−1.2
)
x
=
2.04
x
=
−1
(4)
x
−
0.1
:
−1.6
=
4.5
:
0.9
0.9
×
(
x
−
0.1
)
=
−1.6
×
4.5
x
−
0.1
=
−8
x
=
−7.9
(5)
0.7
:
1.3
=
7
:
x
−
2
0.7
×
(
x
−
2
)
=
1.3
×
7
x
−
2
=
13
x
=
15
(6)
−0.6
:
−0.3
=
−3
:
x
−
1.7
−0.6
×
(
x
−
1.7
)
=
−0.3
×
(
−3
)
x
−
1.7
=
−1.5
x
=
0.2
(7)
2.2
:
11
=
1.6
:
x
+
1.6
2.2
×
(
x
+
1.6
)
=
11
×
1.6
x
+
1.6
=
8
x
=
6.4
(8)
−3
:
−0.3
=
−13
:
x
−
2.2
−3
×
(
x
−
2.2
)
=
−0.3
×
(
−13
)
x
−
2.2
=
−1.3
x
=
0.9
(9)
x
+
1.2
:
1
=
1.6
:
2
2
×
(
x
+
1.2
)
=
1.6
x
+
1.2
=
0.8
x
=
−0.4
(10)
1.8
x
:
3.06
=
−3.6
:
−2
−2
×
1.8
x
=
3.06
×
(
−3.6
)
x
=
3.06
(11)
1.7
x
:
3.06
=
0.5
:
1
1.7
x
=
3.06
×
0.5
x
=
0.9
(12)
−1.5
:
−3
=
−0.4
:
−0.8
x
−1.5
×
(
−0.8
)
x
=
−3
×
(
−0.4
)
x
=
1
(13)
x
+
1.3
:
6.5
=
−0.2
:
1.3
1.3
×
(
x
+
1.3
)
=
6.5
×
(
−0.2
)
x
+
1.3
=
−1
x
=
−2.3
(14)
0.4
:
−0.04
=
x
−
0.5
:
0.2
−0.04
×
(
x
−
0.5
)
=
0.4
×
0.2
x
−
0.5
=
−2
x
=
−1.5
(15)
0.2
:
−1
=
x
+
1.2
:
−0.5
−
(
x
+
1.2
)
=
0.2
×
(
−0.5
)
x
+
1.2
=
0.1
x
=
−1.1
(16)
−2.2
:
1
=
2.31
:
−2.1
x
−2.2
×
(
−2.1
)
x
=
2.31
x
=
0.5