［文字サイズの変更］
▼
▲
©2018 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
)
÷
6
(2)
(
a
×
9
)
×
b
(3)
a
×
{
b
÷
(
−6
)
}
÷
c
÷
d
(4)
a
÷
(
b
÷
c
)
÷
6
(5)
a
÷
{
b
÷
(
−8
)
}
(6)
a
×
(
b
×
9
)
(7)
{
(
−7
)
÷
a
}
÷
b
×
c
(8)
a
÷
(
b
÷
10
)
×
c
×
d
(9)
2
×
(
a
÷
b
)
÷
c
(10)
a
×
(
b
×
c
)
×
9
×
d
(11)
(
a
÷
b
)
×
c
÷
7
(12)
(
a
×
b
)
×
7
(13)
(
10
×
a
)
÷
b
÷
c
÷
d
(14)
(
10
÷
a
)
×
b
×
c
÷
d
(15)
a
÷
(
b
÷
c
)
÷
(
−10
)
×
d
(16)
a
×
(
−10
)
×
b
÷
(
c
×
d
)
(17)
(
a
÷
b
)
÷
(
−4
)
(18)
(
−4
)
÷
a
×
b
÷
(
c
×
d
)
(19)
(
9
÷
a
)
×
b
×
c
(20)
a
÷
{
b
÷
(
−3
)
}
©2018 数学クラブ http://sugaku.club/
月 日（ ）
【解答例】
(1)
(
a
÷
b
)
÷
6
a
=
6
b
(2)
(
a
×
9
)
×
b
=
9
a
b
(3)
a
×
{
b
÷
(
−6
)
}
÷
c
÷
d
a
b
=
−
6
c
d
(4)
a
÷
(
b
÷
c
)
÷
6
a
c
=
6
b
(5)
a
÷
{
b
÷
(
−8
)
}
8
a
=
−
b
(6)
a
×
(
b
×
9
)
=
9
a
b
(7)
{
(
−7
)
÷
a
}
÷
b
×
c
7
c
=
−
a
b
(8)
a
÷
(
b
÷
10
)
×
c
×
d
10
a
c
d
=
b
(9)
2
×
(
a
÷
b
)
÷
c
2
a
=
b
c
(10)
a
×
(
b
×
c
)
×
9
×
d
=
9
a
b
c
d
(11)
(
a
÷
b
)
×
c
÷
7
a
c
=
7
b
(12)
(
a
×
b
)
×
7
=
7
a
b
(13)
(
10
×
a
)
÷
b
÷
c
÷
d
10
a
=
b
c
d
(14)
(
10
÷
a
)
×
b
×
c
÷
d
10
b
c
=
a
d
(15)
a
÷
(
b
÷
c
)
÷
(
−10
)
×
d
a
c
d
=
−
10
b
(16)
a
×
(
−10
)
×
b
÷
(
c
×
d
)
10
a
b
=
−
c
d
(17)
(
a
÷
b
)
÷
(
−4
)
a
=
−
4
b
(18)
(
−4
)
÷
a
×
b
÷
(
c
×
d
)
4
b
=
−
a
c
d
(19)
(
9
÷
a
)
×
b
×
c
9
b
c
=
a
(20)
a
÷
{
b
÷
(
−3
)
}
3
a
=
−
b