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