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