［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
×
(
−2
)
÷
b
÷
(
c
÷
d
)
(2)
a
÷
(
b
×
c
)
÷
6
(3)
a
÷
(
b
÷
10
)
(4)
a
×
b
×
c
÷
{
d
×
(
−9
)
}
(5)
6
×
a
÷
b
×
(
c
÷
d
)
(6)
a
÷
(
3
÷
b
)
×
c
(7)
a
÷
4
÷
(
b
×
c
)
(8)
a
÷
(
10
÷
b
)
(9)
{
(
−4
)
÷
a
}
÷
b
(10)
a
÷
b
÷
(
3
÷
c
)
×
d
(11)
(
−3
)
×
a
÷
(
b
÷
c
)
(12)
(
a
÷
b
)
×
c
×
4
(13)
(
a
÷
b
)
×
c
×
7
(14)
{
a
×
(
−7
)
}
×
b
×
c
(15)
a
÷
(
b
÷
2
)
÷
c
(16)
a
÷
b
÷
c
×
(
3
÷
d
)
(17)
a
÷
b
×
{
(
−6
)
÷
c
}
(18)
a
÷
{
b
÷
(
−10
)
}
(19)
{
(
−4
)
×
a
}
×
b
÷
c
(20)
7
÷
(
a
×
b
)
÷
c
÷
d
©2026 数学クラブ http://sugaku.club/
月 日（ ）
【解答例】
(1)
a
×
(
−2
)
÷
b
÷
(
c
÷
d
)
2
a
d
=
−
b
c
(2)
a
÷
(
b
×
c
)
÷
6
a
=
6
b
c
(3)
a
÷
(
b
÷
10
)
10
a
=
b
(4)
a
×
b
×
c
÷
{
d
×
(
−9
)
}
a
b
c
=
−
9
d
(5)
6
×
a
÷
b
×
(
c
÷
d
)
6
a
c
=
b
d
(6)
a
÷
(
3
÷
b
)
×
c
a
b
c
=
3
(7)
a
÷
4
÷
(
b
×
c
)
a
=
4
b
c
(8)
a
÷
(
10
÷
b
)
a
b
=
10
(9)
{
(
−4
)
÷
a
}
÷
b
4
=
−
a
b
(10)
a
÷
b
÷
(
3
÷
c
)
×
d
a
c
d
=
3
b
(11)
(
−3
)
×
a
÷
(
b
÷
c
)
3
a
c
=
−
b
(12)
(
a
÷
b
)
×
c
×
4
4
a
c
=
b
(13)
(
a
÷
b
)
×
c
×
7
7
a
c
=
b
(14)
{
a
×
(
−7
)
}
×
b
×
c
=
−7
a
b
c
(15)
a
÷
(
b
÷
2
)
÷
c
2
a
=
b
c
(16)
a
÷
b
÷
c
×
(
3
÷
d
)
3
a
=
b
c
d
(17)
a
÷
b
×
{
(
−6
)
÷
c
}
6
a
=
−
b
c
(18)
a
÷
{
b
÷
(
−10
)
}
10
a
=
−
b
(19)
{
(
−4
)
×
a
}
×
b
÷
c
4
a
b
=
−
c
(20)
7
÷
(
a
×
b
)
÷
c
÷
d
7
=
a
b
c
d