［文字サイズの変更］
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©2025 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)
a
×
b
÷
(
−4
)
(2)
3
×
a
×
b
÷
c
×
d
(3)
a
×
b
÷
8
×
c
(4)
a
÷
(
−9
)
×
b
×
c
(5)
a
÷
b
÷
(
−2
)
÷
c
(6)
a
×
2
×
b
÷
c
×
d
(7)
a
÷
b
÷
(
−10
)
(8)
7
×
a
÷
b
(9)
a
×
b
÷
c
×
2
(10)
a
×
b
×
c
×
(
−8
)
(11)
a
×
b
÷
2
÷
c
×
d
(12)
a
×
(
−4
)
÷
b
÷
c
÷
d
(13)
a
×
b
×
(
−4
)
(14)
a
×
b
÷
(
−3
)
×
c
×
d
(15)
a
×
5
×
b
÷
c
(16)
(
−8
)
÷
a
÷
b
(17)
a
÷
9
÷
b
(18)
4
÷
a
×
b
(19)
(
−5
)
×
a
×
b
×
c
(20)
(
−9
)
×
a
×
b
©2025 数学クラブ http://sugaku.club/
月 日（ ）
【解答例】
(1)
a
×
b
÷
(
−4
)
a
b
=
−
4
(2)
3
×
a
×
b
÷
c
×
d
3
a
b
d
=
c
(3)
a
×
b
÷
8
×
c
a
b
c
=
8
(4)
a
÷
(
−9
)
×
b
×
c
a
b
c
=
−
9
(5)
a
÷
b
÷
(
−2
)
÷
c
a
=
−
2
b
c
(6)
a
×
2
×
b
÷
c
×
d
2
a
b
d
=
c
(7)
a
÷
b
÷
(
−10
)
a
=
−
10
b
(8)
7
×
a
÷
b
7
a
=
b
(9)
a
×
b
÷
c
×
2
2
a
b
=
c
(10)
a
×
b
×
c
×
(
−8
)
=
−8
a
b
c
(11)
a
×
b
÷
2
÷
c
×
d
a
b
d
=
2
c
(12)
a
×
(
−4
)
÷
b
÷
c
÷
d
4
a
=
−
b
c
d
(13)
a
×
b
×
(
−4
)
=
−4
a
b
(14)
a
×
b
÷
(
−3
)
×
c
×
d
a
b
c
d
=
−
3
(15)
a
×
5
×
b
÷
c
5
a
b
=
c
(16)
(
−8
)
÷
a
÷
b
8
=
−
a
b
(17)
a
÷
9
÷
b
a
=
9
b
(18)
4
÷
a
×
b
4
b
=
a
(19)
(
−5
)
×
a
×
b
×
c
=
−5
a
b
c
(20)
(
−9
)
×
a
×
b
=
−9
a
b