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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)
−0.4
x
:
−0.84
=
1
:
0.5
(2)
x
−
0.6
:
−11
=
−0.9
:
−4.5
(3)
21
:
−7
=
−0.2
x
:
0.14
(4)
1.8
:
0.9
=
1.8
x
:
0.9
(5)
−1.7
x
:
0.34
=
0.5
:
0.1
(6)
1.68
:
1.4
x
=
0.4
:
1
(7)
−1
:
−0.1
=
x
−
2.1
:
−0.02
(8)
−0.4
x
:
0.48
=
3
:
−2
(9)
2.1
:
3.36
=
x
+
0.2
:
1.6
(10)
1.3
:
x
−
1.5
=
1
:
1.7
(11)
−0.2
:
−1
=
−0.1
:
x
−
0.4
(12)
−0.6
x
:
1.2
=
1.1
:
5.5
(13)
0.1
x
:
−0.65
=
−2.2
:
−1.3
(14)
−11
:
−2.2
=
x
+
0.9
:
−2.2
(15)
1.5
:
−2
=
0.3
:
x
−
1.3
(16)
1.87
:
−0.5
x
=
−1.7
:
2
©2024 数学クラブ http://sugaku.club/
月 日( )
【解答例】
(1)
−0.4
x
:
−0.84
=
1
:
0.5
0.5
×
(
−0.4
)
x
=
−0.84
x
=
4.2
(2)
x
−
0.6
:
−11
=
−0.9
:
−4.5
−4.5
×
(
x
−
0.6
)
=
−11
×
(
−0.9
)
x
−
0.6
=
−2.2
x
=
−1.6
(3)
21
:
−7
=
−0.2
x
:
0.14
−7
×
(
−0.2
)
x
=
21
×
0.14
x
=
2.1
(4)
1.8
:
0.9
=
1.8
x
:
0.9
0.9
×
1.8
x
=
1.8
×
0.9
x
=
1
(5)
−1.7
x
:
0.34
=
0.5
:
0.1
0.1
×
(
−1.7
)
x
=
0.34
×
0.5
x
=
−1
(6)
1.68
:
1.4
x
=
0.4
:
1
0.4
×
1.4
x
=
1.68
x
=
3
(7)
−1
:
−0.1
=
x
−
2.1
:
−0.02
−0.1
×
(
x
−
2.1
)
=
−
(
−0.02
)
x
−
2.1
=
−0.2
x
=
1.9
(8)
−0.4
x
:
0.48
=
3
:
−2
−2
×
(
−0.4
)
x
=
0.48
×
3
x
=
1.8
(9)
2.1
:
3.36
=
x
+
0.2
:
1.6
3.36
×
(
x
+
0.2
)
=
2.1
×
1.6
x
+
0.2
=
1
x
=
0.8
(10)
1.3
:
x
−
1.5
=
1
:
1.7
x
−
1.5
=
1.3
×
1.7
x
−
1.5
=
2.21
x
=
3.71
(11)
−0.2
:
−1
=
−0.1
:
x
−
0.4
−0.2
×
(
x
−
0.4
)
=
−
(
−0.1
)
x
−
0.4
=
−0.5
x
=
−0.1
(12)
−0.6
x
:
1.2
=
1.1
:
5.5
5.5
×
(
−0.6
)
x
=
1.2
×
1.1
x
=
−0.4
(13)
0.1
x
:
−0.65
=
−2.2
:
−1.3
−1.3
×
0.1
x
=
−0.65
×
(
−2.2
)
x
=
−11
(14)
−11
:
−2.2
=
x
+
0.9
:
−2.2
−2.2
×
(
x
+
0.9
)
=
−11
×
(
−2.2
)
x
+
0.9
=
−11
x
=
−11.9
(15)
1.5
:
−2
=
0.3
:
x
−
1.3
1.5
×
(
x
−
1.3
)
=
−2
×
0.3
x
−
1.3
=
−0.4
x
=
0.9
(16)
1.87
:
−0.5
x
=
−1.7
:
2
−1.7
×
(
−0.5
)
x
=
1.87
×
2
x
=
4.4