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