［文字サイズの変更］
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©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)
a
b
10
c
(2)
2
a
b
c
(3)
9
a
b
d
c
(4)
9
a
b
(5)
8
a
b
c
d
(6)
2
b
a
(7)
2
b
c
a
(8)
10
a
b
(9)
4
b
c
a
d
(10)
2
a
b
(11)
7
a
b
c
(12)
10
b
a
(13)
a
b
5
c
(14)
2
a
b
(15)
6
a
c
b
(16)
a
b
3
(17)
6
a
b
c
d
(18)
a
b
c
7
(19)
a
5
b
c
(20)
a
8
b
©2025 数学クラブ http://sugaku.club/
月 日（ ）
【解答例】
(1)
a
b
10
c
=
a
×
b
÷
10
÷
c
(2)
2
a
b
c
=
2
×
a
÷
b
÷
c
(3)
9
a
b
d
c
=
9
×
a
×
b
×
d
÷
c
(4)
9
a
b
=
9
×
a
÷
b
(5)
8
a
b
c
d
=
8
×
a
÷
b
÷
c
÷
d
(6)
2
b
a
=
2
×
b
÷
a
(7)
2
b
c
a
=
2
×
b
×
c
÷
a
(8)
10
a
b
=
10
×
a
×
b
(9)
4
b
c
a
d
=
4
×
b
×
c
÷
a
÷
d
(10)
2
a
b
=
2
÷
a
÷
b
(11)
7
a
b
c
=
7
×
a
÷
b
÷
c
(12)
10
b
a
=
10
×
b
÷
a
(13)
a
b
5
c
=
a
×
b
÷
5
÷
c
(14)
2
a
b
=
2
÷
a
÷
b
(15)
6
a
c
b
=
6
×
a
×
c
÷
b
(16)
a
b
3
=
a
×
b
÷
3
(17)
6
a
b
c
d
=
6
×
a
÷
b
÷
c
÷
d
(18)
a
b
c
7
=
a
×
b
×
c
÷
7
(19)
a
5
b
c
=
a
÷
5
÷
b
÷
c
(20)
a
8
b
=
a
÷
8
÷
b