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©2024 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
)
×
4
÷
d
(2)
(
a
÷
b
)
×
(
−3
)
(3)
2
÷
a
×
(
b
×
c
)
(4)
(
−8
)
×
a
×
(
b
×
c
)
÷
d
(5)
{
a
÷
(
−10
)
}
÷
b
(6)
a
×
(
b
÷
4
)
(7)
a
÷
(
10
×
b
)
(8)
3
÷
(
a
×
b
)
÷
c
(9)
a
÷
(
3
×
b
)
(10)
a
÷
b
÷
(
2
÷
c
)
÷
d
(11)
a
×
(
b
÷
10
)
×
c
×
d
(12)
a
÷
(
10
÷
b
)
(13)
(
a
×
3
)
×
b
×
c
×
d
(14)
a
÷
{
(
−5
)
÷
b
}
÷
c
(15)
a
÷
(
−9
)
×
(
b
÷
c
)
(16)
(
a
÷
b
)
×
(
−2
)
(17)
(
−4
)
×
a
×
(
b
÷
c
)
(18)
{
(
−4
)
×
a
}
×
b
(19)
a
÷
(
7
÷
b
)
×
c
÷
d
(20)
{
a
×
(
−9
)
}
÷
b
÷
c
©2024 数学クラブ http://sugaku.club/
月 日（ ）
【解答例】
(1)
a
÷
(
b
÷
c
)
×
4
÷
d
4
a
c
=
b
d
(2)
(
a
÷
b
)
×
(
−3
)
3
a
=
−
b
(3)
2
÷
a
×
(
b
×
c
)
2
b
c
=
a
(4)
(
−8
)
×
a
×
(
b
×
c
)
÷
d
8
a
b
c
=
−
d
(5)
{
a
÷
(
−10
)
}
÷
b
a
=
−
10
b
(6)
a
×
(
b
÷
4
)
a
b
=
4
(7)
a
÷
(
10
×
b
)
a
=
10
b
(8)
3
÷
(
a
×
b
)
÷
c
3
=
a
b
c
(9)
a
÷
(
3
×
b
)
a
=
3
b
(10)
a
÷
b
÷
(
2
÷
c
)
÷
d
a
c
=
2
b
d
(11)
a
×
(
b
÷
10
)
×
c
×
d
a
b
c
d
=
10
(12)
a
÷
(
10
÷
b
)
a
b
=
10
(13)
(
a
×
3
)
×
b
×
c
×
d
=
3
a
b
c
d
(14)
a
÷
{
(
−5
)
÷
b
}
÷
c
a
b
=
−
5
c
(15)
a
÷
(
−9
)
×
(
b
÷
c
)
a
b
=
−
9
c
(16)
(
a
÷
b
)
×
(
−2
)
2
a
=
−
b
(17)
(
−4
)
×
a
×
(
b
÷
c
)
4
a
b
=
−
c
(18)
{
(
−4
)
×
a
}
×
b
=
−4
a
b
(19)
a
÷
(
7
÷
b
)
×
c
÷
d
a
b
c
=
7
d
(20)
{
a
×
(
−9
)
}
÷
b
÷
c
9
a
=
−
b
c