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