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