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