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