［文字サイズの変更］
▼
▲
©2025 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
÷
(
10
÷
b
)
(2)
(
a
×
b
)
×
(
−4
)
×
c
÷
d
(3)
a
÷
{
b
÷
(
−5
)
}
(4)
(
7
÷
a
)
÷
b
(5)
a
÷
b
×
9
÷
(
c
÷
d
)
(6)
a
×
{
(
−2
)
÷
b
}
÷
c
(7)
(
−5
)
×
(
a
÷
b
)
(8)
(
a
×
b
)
×
c
×
d
÷
10
(9)
(
a
÷
b
)
×
8
(10)
a
×
5
×
(
b
×
c
)
(11)
(
a
÷
b
)
÷
c
×
d
÷
6
(12)
a
×
b
×
2
×
(
c
×
d
)
(13)
{
(
−3
)
÷
a
}
÷
b
÷
c
(14)
(
a
÷
b
)
×
(
−9
)
÷
c
(15)
a
×
b
÷
(
c
÷
d
)
÷
(
−4
)
(16)
a
×
b
×
(
7
÷
c
)
×
d
(17)
(
a
÷
7
)
÷
b
÷
c
÷
d
(18)
(
8
÷
a
)
×
b
(19)
a
÷
(
b
÷
c
)
×
6
(20)
(
−10
)
÷
(
a
×
b
)
÷
c
©2025 数学クラブ http://sugaku.club/
月 日（ ）
【解答例】
(1)
a
÷
(
10
÷
b
)
a
b
=
10
(2)
(
a
×
b
)
×
(
−4
)
×
c
÷
d
4
a
b
c
=
−
d
(3)
a
÷
{
b
÷
(
−5
)
}
5
a
=
−
b
(4)
(
7
÷
a
)
÷
b
7
=
a
b
(5)
a
÷
b
×
9
÷
(
c
÷
d
)
9
a
d
=
b
c
(6)
a
×
{
(
−2
)
÷
b
}
÷
c
2
a
=
−
b
c
(7)
(
−5
)
×
(
a
÷
b
)
5
a
=
−
b
(8)
(
a
×
b
)
×
c
×
d
÷
10
a
b
c
d
=
10
(9)
(
a
÷
b
)
×
8
8
a
=
b
(10)
a
×
5
×
(
b
×
c
)
=
5
a
b
c
(11)
(
a
÷
b
)
÷
c
×
d
÷
6
a
d
=
6
b
c
(12)
a
×
b
×
2
×
(
c
×
d
)
=
2
a
b
c
d
(13)
{
(
−3
)
÷
a
}
÷
b
÷
c
3
=
−
a
b
c
(14)
(
a
÷
b
)
×
(
−9
)
÷
c
9
a
=
−
b
c
(15)
a
×
b
÷
(
c
÷
d
)
÷
(
−4
)
a
b
d
=
−
4
c
(16)
a
×
b
×
(
7
÷
c
)
×
d
7
a
b
d
=
c
(17)
(
a
÷
7
)
÷
b
÷
c
÷
d
a
=
7
b
c
d
(18)
(
8
÷
a
)
×
b
8
b
=
a
(19)
a
÷
(
b
÷
c
)
×
6
6
a
c
=
b
(20)
(
−10
)
÷
(
a
×
b
)
÷
c
10
=
−
a
b
c