［文字サイズの変更］
▼
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©2026 数学クラブ http://sugaku.club/
月 日（ ）
● 次の式を，文字式の表し方にしたがって書きましょう
[07E-00]
(1)
(
a
÷
b
)
÷
c
×
(
−7
)
×
d
(2)
(
a
÷
b
)
÷
(
−4
)
(3)
(
−5
)
×
a
÷
b
×
(
c
÷
d
)
(4)
2
÷
(
a
÷
b
)
÷
c
(5)
(
−4
)
×
a
÷
b
÷
(
c
×
d
)
(6)
9
÷
(
a
÷
b
)
×
c
×
d
(7)
a
÷
{
(
−5
)
×
b
}
(8)
a
÷
b
÷
{
c
÷
(
−7
)
}
÷
d
(9)
(
a
×
b
)
×
3
(10)
(
a
÷
b
)
÷
c
×
7
(11)
a
÷
(
b
×
4
)
÷
c
(12)
{
a
×
(
−7
)
}
÷
b
(13)
(
a
×
b
)
×
c
×
d
÷
10
(14)
a
÷
b
÷
{
(
−5
)
÷
c
}
(15)
a
÷
b
÷
{
(
−7
)
÷
c
}
÷
d
(16)
a
÷
{
(
−9
)
÷
b
}
×
c
(17)
a
×
(
b
÷
c
)
×
(
−6
)
÷
d
(18)
a
÷
b
×
(
c
÷
d
)
÷
10
(19)
9
×
(
a
÷
b
)
(20)
{
a
×
(
−2
)
}
÷
b
©2026 数学クラブ http://sugaku.club/
月 日（ ）
【解答例】
(1)
(
a
÷
b
)
÷
c
×
(
−7
)
×
d
7
a
d
=
−
b
c
(2)
(
a
÷
b
)
÷
(
−4
)
a
=
−
4
b
(3)
(
−5
)
×
a
÷
b
×
(
c
÷
d
)
5
a
c
=
−
b
d
(4)
2
÷
(
a
÷
b
)
÷
c
2
b
=
a
c
(5)
(
−4
)
×
a
÷
b
÷
(
c
×
d
)
4
a
=
−
b
c
d
(6)
9
÷
(
a
÷
b
)
×
c
×
d
9
b
c
d
=
a
(7)
a
÷
{
(
−5
)
×
b
}
a
=
−
5
b
(8)
a
÷
b
÷
{
c
÷
(
−7
)
}
÷
d
7
a
=
−
b
c
d
(9)
(
a
×
b
)
×
3
=
3
a
b
(10)
(
a
÷
b
)
÷
c
×
7
7
a
=
b
c
(11)
a
÷
(
b
×
4
)
÷
c
a
=
4
b
c
(12)
{
a
×
(
−7
)
}
÷
b
7
a
=
−
b
(13)
(
a
×
b
)
×
c
×
d
÷
10
a
b
c
d
=
10
(14)
a
÷
b
÷
{
(
−5
)
÷
c
}
a
c
=
−
5
b
(15)
a
÷
b
÷
{
(
−7
)
÷
c
}
÷
d
a
c
=
−
7
b
d
(16)
a
÷
{
(
−9
)
÷
b
}
×
c
a
b
c
=
−
9
(17)
a
×
(
b
÷
c
)
×
(
−6
)
÷
d
6
a
b
=
−
c
d
(18)
a
÷
b
×
(
c
÷
d
)
÷
10
a
c
=
10
b
d
(19)
9
×
(
a
÷
b
)
9
a
=
b
(20)
{
a
×
(
−2
)
}
÷
b
2
a
=
−
b