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