［文字サイズの変更］
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©2026 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)
(
−8
)
×
a
÷
b
×
c
(2)
a
÷
b
×
5
×
c
÷
d
(3)
3
×
a
×
b
×
c
(4)
a
÷
b
÷
2
÷
c
÷
d
(5)
8
÷
a
÷
b
÷
c
(6)
a
×
3
×
b
×
c
(7)
a
÷
(
−5
)
÷
b
×
c
(8)
a
÷
b
×
c
÷
d
÷
(
−4
)
(9)
a
÷
6
÷
b
(10)
a
×
b
×
(
−5
)
(11)
a
×
4
×
b
÷
c
÷
d
(12)
a
×
b
÷
c
÷
(
−10
)
÷
d
(13)
a
÷
b
÷
c
÷
3
(14)
(
−7
)
×
a
÷
b
÷
c
×
d
(15)
5
×
a
×
b
(16)
a
÷
b
×
(
−4
)
÷
c
÷
d
(17)
a
×
(
−9
)
×
b
÷
c
(18)
a
×
b
÷
c
÷
(
−8
)
(19)
9
×
a
×
b
×
c
(20)
a
×
b
×
2
©2026 数学クラブ http://sugaku.club/
月 日（ ）
【解答例】
(1)
(
−8
)
×
a
÷
b
×
c
8
a
c
=
−
b
(2)
a
÷
b
×
5
×
c
÷
d
5
a
c
=
b
d
(3)
3
×
a
×
b
×
c
=
3
a
b
c
(4)
a
÷
b
÷
2
÷
c
÷
d
a
=
2
b
c
d
(5)
8
÷
a
÷
b
÷
c
8
=
a
b
c
(6)
a
×
3
×
b
×
c
=
3
a
b
c
(7)
a
÷
(
−5
)
÷
b
×
c
a
c
=
−
5
b
(8)
a
÷
b
×
c
÷
d
÷
(
−4
)
a
c
=
−
4
b
d
(9)
a
÷
6
÷
b
a
=
6
b
(10)
a
×
b
×
(
−5
)
=
−5
a
b
(11)
a
×
4
×
b
÷
c
÷
d
4
a
b
=
c
d
(12)
a
×
b
÷
c
÷
(
−10
)
÷
d
a
b
=
−
10
c
d
(13)
a
÷
b
÷
c
÷
3
a
=
3
b
c
(14)
(
−7
)
×
a
÷
b
÷
c
×
d
7
a
d
=
−
b
c
(15)
5
×
a
×
b
=
5
a
b
(16)
a
÷
b
×
(
−4
)
÷
c
÷
d
4
a
=
−
b
c
d
(17)
a
×
(
−9
)
×
b
÷
c
9
a
b
=
−
c
(18)
a
×
b
÷
c
÷
(
−8
)
a
b
=
−
8
c
(19)
9
×
a
×
b
×
c
=
9
a
b
c
(20)
a
×
b
×
2
=
2
a
b