［文字サイズの変更］
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©2018 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
d
10
b
c
(2)
a
b
8
(3)
2
b
a
(4)
8
a
b
c
d
(5)
8
a
b
(6)
5
a
d
b
c
(7)
7
a
b
c
d
(8)
6
a
b
(9)
10
b
a
(10)
a
b
d
2
c
(11)
a
3
b
(12)
3
a
b
(13)
8
a
b
c
d
(14)
6
a
b
c
(15)
8
a
c
b
d
(16)
4
a
b
(17)
2
a
b
c
d
(18)
10
a
c
b
(19)
a
b
d
9
c
(20)
a
9
b
©2018 数学クラブ http://sugaku.club/
月 日（ ）
【解答例】
(1)
a
d
10
b
c
=
a
×
d
÷
10
÷
b
÷
c
(2)
a
b
8
=
a
×
b
÷
8
(3)
2
b
a
=
2
×
b
÷
a
(4)
8
a
b
c
d
=
8
×
a
×
b
÷
c
÷
d
(5)
8
a
b
=
8
×
a
÷
b
(6)
5
a
d
b
c
=
5
×
a
×
d
÷
b
÷
c
(7)
7
a
b
c
d
=
7
×
a
×
b
÷
c
÷
d
(8)
6
a
b
=
6
×
a
÷
b
(9)
10
b
a
=
10
×
b
÷
a
(10)
a
b
d
2
c
=
a
×
b
×
d
÷
2
÷
c
(11)
a
3
b
=
a
÷
3
÷
b
(12)
3
a
b
=
3
÷
a
÷
b
(13)
8
a
b
c
d
=
8
×
a
×
b
÷
c
÷
d
(14)
6
a
b
c
=
6
×
a
÷
b
÷
c
(15)
8
a
c
b
d
=
8
×
a
×
c
÷
b
÷
d
(16)
4
a
b
=
4
×
a
×
b
(17)
2
a
b
c
d
=
2
×
a
÷
b
÷
c
÷
d
(18)
10
a
c
b
=
10
×
a
×
c
÷
b
(19)
a
b
d
9
c
=
a
×
b
×
d
÷
9
÷
c
(20)
a
9
b
=
a
÷
9
÷
b