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