[文字サイズの変更]
▼
▲
©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)
−11
:
−0.5
=
0.7
x
:
−0.07
(2)
3.61
:
−1.9
x
=
−3.8
:
−1
(3)
−0.6
:
x
−
0.3
=
−0.48
:
−1.2
(4)
x
+
0.5
:
0.3
=
7
:
1.5
(5)
−0.7
:
x
+
0.5
=
−1.7
:
−17
(6)
0.2
x
:
0.468
=
−2
:
−3.6
(7)
−3
:
x
−
1
=
−0.3
:
2.1
(8)
9
:
1.8
=
−2.2
x
:
0.22
(9)
−1.2
:
x
−
1.2
=
−2
:
3.5
(10)
3
:
−1
=
x
−
1.8
:
−0.2
(11)
−2.88
:
1.6
x
=
0.7
:
3.5
(12)
−0.33
:
1.1
x
=
−1.2
:
−6
(13)
−0.3
x
:
0.36
=
−1.2
:
−0.72
(14)
9.5
:
1.9
=
−0.4
:
0.4
x
(15)
−0.3
:
−0.12
=
x
+
0.1
:
−0.4
(16)
3
:
1.5
=
1.12
:
−1.4
x
©2024 数学クラブ http://sugaku.club/
月 日( )
【解答例】
(1)
−11
:
−0.5
=
0.7
x
:
−0.07
−0.5
×
0.7
x
=
−11
×
(
−0.07
)
x
=
−2.2
(2)
3.61
:
−1.9
x
=
−3.8
:
−1
−3.8
×
(
−1.9
)
x
=
3.61
×
(
−1
)
x
=
−0.5
(3)
−0.6
:
x
−
0.3
=
−0.48
:
−1.2
−0.48
×
(
x
−
0.3
)
=
−0.6
×
(
−1.2
)
x
−
0.3
=
−1.5
x
=
−1.2
(4)
x
+
0.5
:
0.3
=
7
:
1.5
1.5
×
(
x
+
0.5
)
=
0.3
×
7
x
+
0.5
=
1.4
x
=
0.9
(5)
−0.7
:
x
+
0.5
=
−1.7
:
−17
−1.7
×
(
x
+
0.5
)
=
−0.7
×
(
−17
)
x
+
0.5
=
−7
x
=
−7.5
(6)
0.2
x
:
0.468
=
−2
:
−3.6
−3.6
×
0.2
x
=
0.468
×
(
−2
)
x
=
1.3
(7)
−3
:
x
−
1
=
−0.3
:
2.1
−0.3
×
(
x
−
1
)
=
−3
×
2.1
x
−
1
=
21
x
=
22
(8)
9
:
1.8
=
−2.2
x
:
0.22
1.8
×
(
−2.2
)
x
=
9
×
0.22
x
=
−0.5
(9)
−1.2
:
x
−
1.2
=
−2
:
3.5
−2
×
(
x
−
1.2
)
=
−1.2
×
3.5
x
−
1.2
=
2.1
x
=
3.3
(10)
3
:
−1
=
x
−
1.8
:
−0.2
−
(
x
−
1.8
)
=
3
×
(
−0.2
)
x
−
1.8
=
0.6
x
=
2.4
(11)
−2.88
:
1.6
x
=
0.7
:
3.5
0.7
×
1.6
x
=
−2.88
×
3.5
x
=
−9
(12)
−0.33
:
1.1
x
=
−1.2
:
−6
−1.2
×
1.1
x
=
−0.33
×
(
−6
)
x
=
−1.5
(13)
−0.3
x
:
0.36
=
−1.2
:
−0.72
−0.72
×
(
−0.3
)
x
=
0.36
×
(
−1.2
)
x
=
−2
(14)
9.5
:
1.9
=
−0.4
:
0.4
x
9.5
×
0.4
x
=
1.9
×
(
−0.4
)
x
=
−0.2
(15)
−0.3
:
−0.12
=
x
+
0.1
:
−0.4
−0.12
×
(
x
+
0.1
)
=
−0.3
×
(
−0.4
)
x
+
0.1
=
−1
x
=
−1.1
(16)
3
:
1.5
=
1.12
:
−1.4
x
3
×
(
−1.4
)
x
=
1.5
×
1.12
x
=
−0.4