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