［文字サイズの変更］
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©2019 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)
(
−10
)
×
a
×
b
(2)
a
÷
b
÷
2
×
c
×
d
(3)
a
÷
b
÷
(
−2
)
(4)
a
×
(
−2
)
×
b
(5)
a
×
(
−10
)
×
b
÷
c
×
d
(6)
3
×
a
×
b
÷
c
(7)
a
×
(
−7
)
÷
b
÷
c
÷
d
(8)
9
÷
a
÷
b
×
c
(9)
a
×
b
×
c
×
d
×
8
(10)
(
−8
)
×
a
÷
b
×
c
(11)
a
×
b
×
10
×
c
÷
d
(12)
a
×
b
÷
4
(13)
(
−2
)
×
a
×
b
(14)
a
÷
b
÷
(
−9
)
(15)
a
×
b
÷
8
÷
c
×
d
(16)
a
×
b
÷
c
×
4
(17)
(
−7
)
÷
a
×
b
(18)
(
−5
)
×
a
×
b
÷
c
÷
d
(19)
3
×
a
×
b
×
c
÷
d
(20)
a
×
b
÷
8
÷
c
×
d
©2019 数学クラブ http://sugaku.club/
月 日（ ）
【解答例】
(1)
(
−10
)
×
a
×
b
=
−10
a
b
(2)
a
÷
b
÷
2
×
c
×
d
a
c
d
=
2
b
(3)
a
÷
b
÷
(
−2
)
a
=
−
2
b
(4)
a
×
(
−2
)
×
b
=
−2
a
b
(5)
a
×
(
−10
)
×
b
÷
c
×
d
10
a
b
d
=
−
c
(6)
3
×
a
×
b
÷
c
3
a
b
=
c
(7)
a
×
(
−7
)
÷
b
÷
c
÷
d
7
a
=
−
b
c
d
(8)
9
÷
a
÷
b
×
c
9
c
=
a
b
(9)
a
×
b
×
c
×
d
×
8
=
8
a
b
c
d
(10)
(
−8
)
×
a
÷
b
×
c
8
a
c
=
−
b
(11)
a
×
b
×
10
×
c
÷
d
10
a
b
c
=
d
(12)
a
×
b
÷
4
a
b
=
4
(13)
(
−2
)
×
a
×
b
=
−2
a
b
(14)
a
÷
b
÷
(
−9
)
a
=
−
9
b
(15)
a
×
b
÷
8
÷
c
×
d
a
b
d
=
8
c
(16)
a
×
b
÷
c
×
4
4
a
b
=
c
(17)
(
−7
)
÷
a
×
b
7
b
=
−
a
(18)
(
−5
)
×
a
×
b
÷
c
÷
d
5
a
b
=
−
c
d
(19)
3
×
a
×
b
×
c
÷
d
3
a
b
c
=
d
(20)
a
×
b
÷
8
÷
c
×
d
a
b
d
=
8
c