［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
[077-00]
(1)
5
a
−
c
b
(2)
a
b
−
c
＋
7
(3)
a
−
8
c
d
b
(4)
a
＋
c
＋
5
b
(5)
a
b
＋
8
c
(6)
10
c
a
b
−
d
(7)
a
8
−
b
c
(8)
10
b
＋
a
c
(9)
a
＋
5
b
c
(10)
a
＋
4
b
(11)
c
a
b
＋
＋
9
d
(12)
a
5
c
＋
b
d
(13)
7
a
＋
b
c
(14)
a
＋
6
b
(15)
a
b
＋
7
(16)
7
b
−
a
c
(17)
3
a
b
−
c
＋
d
(18)
c
a
＋
2
b
＋
d
(19)
5
＋
b
a
(20)
4
−
b
a
©2026 数学クラブ http://sugaku.club/
月 日（ ）
【解答例】
(1)
5
a
−
c
b
=
5
×
a
÷
b
−
c
(2)
a
b
−
c
＋
7
=
a
×
b
−
c
＋
7
(3)
a
−
8
c
d
b
=
a
÷
b
−
8
×
c
×
d
(4)
a
＋
c
＋
5
b
=
a
÷
b
＋
c
＋
5
(5)
a
b
＋
8
c
=
a
×
b
÷
c
＋
8
(6)
10
c
a
b
−
d
=
a
×
b
−
10
×
c
÷
d
(7)
a
8
−
b
c
=
a
÷
b
−
8
÷
c
(8)
10
b
＋
a
c
=
10
÷
a
＋
b
÷
c
(9)
a
＋
5
b
c
=
a
＋
5
×
b
×
c
(10)
a
＋
4
b
=
a
÷
b
＋
4
(11)
c
a
b
＋
＋
9
d
=
a
×
b
＋
c
÷
d
＋
9
(12)
a
5
c
＋
b
d
=
a
÷
b
＋
5
×
c
÷
d
(13)
7
a
＋
b
c
=
7
×
a
＋
b
×
c
(14)
a
＋
6
b
=
a
＋
6
×
b
(15)
a
b
＋
7
=
a
×
b
＋
7
(16)
7
b
−
a
c
=
7
÷
a
−
b
÷
c
(17)
3
a
b
−
c
＋
d
=
a
×
b
−
c
＋
3
÷
d
(18)
c
a
＋
2
b
＋
d
=
a
＋
2
×
b
＋
c
÷
d
(19)
5
＋
b
a
=
5
÷
a
＋
b
(20)
4
−
b
a
=
4
÷
a
−
b