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©2026 数学クラブ http://sugaku.club/
月 日( )
● 次の式を計算しなさい
[1A0-00]
(1)
4
a
b
+
4
a
3
a
(2)
3
(
8
x
−
1
)
(3)
2
(
9
a
b
+
10
a
)
a
(4)
7
(
8
x
−
1
)
(5)
6
(
5
a
+
10
b
+
3
)
(6)
4
(
9
a
b
−
2
a
)
÷
a
(7)
6
(
10
u
v
+
6
u
)
u
(8)
8
(
10
a
b
−
5
a
)
a
(9)
10
(
2
x
y
−
x
)
x
(10)
9
(
8
u
v
+
6
u
)
u
(11)
2
(
4
u
+
7
v
−
1
)
(12)
7
y
(
10
x
+
2
)
(13)
3
u
v
+
3
u
8
u
(14)
7
u
v
+
10
u
3
u
©2026 数学クラブ http://sugaku.club/
月 日( )
【解答例】
(1)
4
a
b
+
4
a
3
a
=
12
b
+
12
(2)
3
(
8
x
−
1
)
=
24
x
−
3
(3)
2
(
9
a
b
+
10
a
)
a
=
18
b
+
20
(4)
7
(
8
x
−
1
)
=
56
x
−
7
(5)
6
(
5
a
+
10
b
+
3
)
=
30
a
+
60
b
+
18
(6)
4
(
9
a
b
−
2
a
)
÷
a
=
36
b
−
8
(7)
6
(
10
u
v
+
6
u
)
u
=
60
v
+
36
(8)
8
(
10
a
b
−
5
a
)
a
=
80
b
−
40
(9)
10
(
2
x
y
−
x
)
x
=
20
y
−
10
(10)
9
(
8
u
v
+
6
u
)
u
=
72
v
+
54
(11)
2
(
4
u
+
7
v
−
1
)
=
8
u
+
14
v
−
2
(12)
7
y
(
10
x
+
2
)
=
70
x
y
+
14
y
(13)
3
u
v
+
3
u
8
u
=
24
v
+
24
(14)
7
u
v
+
10
u
3
u
=
21
v
+
30