［文字サイズの変更］
▼
▲
©2025 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
10
c
(3)
2
a
b
c
d
(4)
2
a
b
(5)
a
c
5
b
(6)
3
a
d
b
c
(7)
3
a
b
(8)
a
b
7
c
(9)
a
4
b
(10)
5
a
c
d
b
(11)
a
b
8
c
(12)
a
b
c
9
(13)
a
b
6
c
(14)
a
9
b
c
d
(15)
a
b
d
9
c
(16)
a
b
c
d
3
(17)
5
a
b
(18)
10
a
b
c
(19)
5
a
c
b
d
(20)
4
a
b
©2025 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
10
c
=
a
×
b
÷
10
÷
c
(3)
2
a
b
c
d
=
2
÷
a
÷
b
÷
c
÷
d
(4)
2
a
b
=
2
×
a
×
b
(5)
a
c
5
b
=
a
×
c
÷
5
÷
b
(6)
3
a
d
b
c
=
3
×
a
×
d
÷
b
÷
c
(7)
3
a
b
=
3
×
a
÷
b
(8)
a
b
7
c
=
a
×
b
÷
7
÷
c
(9)
a
4
b
=
a
÷
4
÷
b
(10)
5
a
c
d
b
=
5
×
a
×
c
×
d
÷
b
(11)
a
b
8
c
=
a
×
b
÷
8
÷
c
(12)
a
b
c
9
=
a
×
b
×
c
÷
9
(13)
a
b
6
c
=
a
×
b
÷
6
÷
c
(14)
a
9
b
c
d
=
a
÷
9
÷
b
÷
c
÷
d
(15)
a
b
d
9
c
=
a
×
b
×
d
÷
9
÷
c
(16)
a
b
c
d
3
=
a
×
b
×
c
×
d
÷
3
(17)
5
a
b
=
5
×
a
×
b
(18)
10
a
b
c
=
10
×
a
÷
b
÷
c
(19)
5
a
c
b
d
=
5
×
a
×
c
÷
b
÷
d
(20)
4
a
b
=
4
×
a
÷
b