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©2026 数学クラブ http://sugaku.club/
月 日（ ）
● 次の式を，記号×÷を使って書きましょう
[07D-00]
(1)
2
a
b
c
(2)
a
b
4
c
(3)
a
3
b
c
d
(4)
8
b
c
a
(5)
a
b
4
(6)
a
b
3
c
(7)
2
a
b
(8)
a
b
6
c
(9)
2
a
c
b
(10)
a
c
4
b
d
(11)
8
a
c
d
b
(12)
9
b
d
a
c
(13)
3
a
b
c
(14)
8
a
b
c
(15)
8
a
b
c
d
(16)
a
d
7
b
c
(17)
6
a
b
c
(18)
3
a
b
(19)
9
a
b
(20)
a
b
10
c
d
©2026 数学クラブ http://sugaku.club/
月 日（ ）
【解答例】
(1)
2
a
b
c
=
2
×
a
÷
b
÷
c
(2)
a
b
4
c
=
a
×
b
÷
4
÷
c
(3)
a
3
b
c
d
=
a
÷
3
÷
b
÷
c
÷
d
(4)
8
b
c
a
=
8
×
b
×
c
÷
a
(5)
a
b
4
=
a
×
b
÷
4
(6)
a
b
3
c
=
a
×
b
÷
3
÷
c
(7)
2
a
b
=
2
×
a
÷
b
(8)
a
b
6
c
=
a
×
b
÷
6
÷
c
(9)
2
a
c
b
=
2
×
a
×
c
÷
b
(10)
a
c
4
b
d
=
a
×
c
÷
4
÷
b
÷
d
(11)
8
a
c
d
b
=
8
×
a
×
c
×
d
÷
b
(12)
9
b
d
a
c
=
9
×
b
×
d
÷
a
÷
c
(13)
3
a
b
c
=
3
×
a
÷
b
÷
c
(14)
8
a
b
c
=
8
×
a
×
b
×
c
(15)
8
a
b
c
d
=
8
×
a
×
b
÷
c
÷
d
(16)
a
d
7
b
c
=
a
×
d
÷
7
÷
b
÷
c
(17)
6
a
b
c
=
6
×
a
÷
b
÷
c
(18)
3
a
b
=
3
×
a
×
b
(19)
9
a
b
=
9
×
a
×
b
(20)
a
b
10
c
d
=
a
×
b
÷
10
÷
c
÷
d