[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
[07B-00]
(1)
a
2
+
7
+
c
b
(2)
2
7
a
−
b
(3)
7
a
2
+
c
b
(4)
2
a
−
b
−
2
c
d
(5)
2
5
a
+
−
c
b
(6)
3
5
a
b
+
c
(7)
4
a
b
+
c
+
7
(8)
4
5
+
a
+
b
+
c
−
d
(9)
3
a
+
10
(10)
4
2
a
b
−
d
c
(11)
3
3
a
(12)
2
a
−
b
+
c
+
d
+
9
(13)
4
5
−
a
+
b
(14)
2
a
+
2
(15)
4
8
a
(16)
2
a
9
−
−
d
b
c
(17)
3
8
a
(18)
2
a
+
5
(19)
2
a
+
b
+
7
(20)
2
7
a
©2025 数学クラブ http://sugaku.club/
月 日( )
【解答例】
(1)
a
2
+
7
+
c
b
=
a
÷
b
+
7
+
c
×
c
(2)
2
7
a
−
b
=
a
−
7
×
7
÷
b
(3)
7
a
2
+
c
b
=
7
×
a
÷
b
+
c
×
c
(4)
2
a
−
b
−
2
c
d
=
a
−
b
−
2
×
c
×
c
×
d
(5)
2
5
a
+
−
c
b
=
a
+
5
×
5
÷
b
−
c
(6)
3
5
a
b
+
c
=
a
×
b
+
5
×
5
×
5
÷
c
(7)
4
a
b
+
c
+
7
=
a
×
b
+
c
+
7
×
7
×
7
×
7
(8)
4
5
+
a
+
b
+
c
−
d
=
5
+
a
+
b
+
c
×
c
×
c
×
c
−
d
(9)
3
a
+
10
=
a
+
10
×
10
×
10
(10)
4
2
a
b
−
d
c
=
2
×
a
×
b
×
b
×
b
×
b
÷
c
−
d
(11)
3
3
a
=
3
×
a
×
a
×
a
(12)
2
a
−
b
+
c
+
d
+
9
=
a
−
b
+
c
+
d
×
d
+
9
(13)
4
5
−
a
+
b
=
5
−
a
×
a
×
a
×
a
+
b
(14)
2
a
+
2
=
a
+
2
×
2
(15)
4
8
a
=
8
×
a
×
a
×
a
×
a
(16)
2
a
9
−
−
d
b
c
=
9
−
a
×
a
÷
b
÷
c
−
d
(17)
3
8
a
=
8
×
a
×
a
×
a
(18)
2
a
+
5
=
a
+
5
×
5
(19)
2
a
+
b
+
7
=
a
+
b
+
7
×
7
(20)
2
7
a
=
7
×
a
×
a