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