［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
[07C-00]
(1)
(
−9
)
×
a
÷
b
÷
c
÷
d
(2)
a
×
b
÷
c
×
d
×
(
−5
)
(3)
a
÷
7
×
b
×
c
(4)
a
×
(
−3
)
×
b
(5)
9
÷
a
×
b
(6)
a
×
(
−2
)
÷
b
÷
c
(7)
a
×
10
÷
b
÷
c
÷
d
(8)
a
÷
b
÷
c
÷
(
−3
)
(9)
a
×
(
−5
)
×
b
(10)
(
−6
)
×
a
×
b
×
c
÷
d
(11)
a
÷
b
×
c
×
5
×
d
(12)
a
÷
b
÷
(
−3
)
×
c
÷
d
(13)
a
÷
(
−9
)
÷
b
×
c
(14)
a
÷
(
−8
)
×
b
×
c
÷
d
(15)
a
×
(
−7
)
×
b
(16)
(
−8
)
÷
a
÷
b
(17)
(
−10
)
÷
a
×
b
(18)
a
×
b
÷
(
−2
)
(19)
a
÷
(
−10
)
×
b
÷
c
÷
d
(20)
a
×
b
÷
4
÷
c
×
d
©2018 数学クラブ http://sugaku.club/
月 日（ ）
【解答例】
(1)
(
−9
)
×
a
÷
b
÷
c
÷
d
9
a
=
−
b
c
d
(2)
a
×
b
÷
c
×
d
×
(
−5
)
5
a
b
d
=
−
c
(3)
a
÷
7
×
b
×
c
a
b
c
=
7
(4)
a
×
(
−3
)
×
b
=
−3
a
b
(5)
9
÷
a
×
b
9
b
=
a
(6)
a
×
(
−2
)
÷
b
÷
c
2
a
=
−
b
c
(7)
a
×
10
÷
b
÷
c
÷
d
10
a
=
b
c
d
(8)
a
÷
b
÷
c
÷
(
−3
)
a
=
−
3
b
c
(9)
a
×
(
−5
)
×
b
=
−5
a
b
(10)
(
−6
)
×
a
×
b
×
c
÷
d
6
a
b
c
=
−
d
(11)
a
÷
b
×
c
×
5
×
d
5
a
c
d
=
b
(12)
a
÷
b
÷
(
−3
)
×
c
÷
d
a
c
=
−
3
b
d
(13)
a
÷
(
−9
)
÷
b
×
c
a
c
=
−
9
b
(14)
a
÷
(
−8
)
×
b
×
c
÷
d
a
b
c
=
−
8
d
(15)
a
×
(
−7
)
×
b
=
−7
a
b
(16)
(
−8
)
÷
a
÷
b
8
=
−
a
b
(17)
(
−10
)
÷
a
×
b
10
b
=
−
a
(18)
a
×
b
÷
(
−2
)
a
b
=
−
2
(19)
a
÷
(
−10
)
×
b
÷
c
÷
d
a
b
=
−
10
c
d
(20)
a
×
b
÷
4
÷
c
×
d
a
b
d
=
4
c