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