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