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