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©2025 数学クラブ http://sugaku.club/
月 日（ ）
● 次の計算をしましょう
[161-00]
(1)
3
3
a
b
×
(
−6
)
a
b
(2)
3
3
4
u
×
10
u
(3)
2
−4
u
v
×
(
−9
)
v
(4)
3
8
a
b
×
5
b
(5)
3
3
−6
a
b
×
3
a
(6)
3
−6
p
q
×
(
−4
)
q
(7)
2
10
u
×
(
−10
)
u
(8)
2
3
5
a
×
6
a
(9)
2
8
x
y
×
3
x
y
(10)
2
2
3
−4
a
b
×
9
a
b
(11)
2
2
10
u
×
(
−3
)
u
(12)
3
−9
x
y
×
7
x
(13)
3
2
5
u
v
×
6
v
(14)
3
2
−10
p
q
×
(
−2
)
q
(15)
3
3
p
q
×
(
−9
)
p
(16)
2
3
−2
a
×
(
−7
)
a
©2025 数学クラブ http://sugaku.club/
月 日（ ）
【解答例】
(1)
3
3
a
b
×
(
−6
)
a
b
3
4
2
=
3
a
b
×
(
−6
)
a
b
=
−18
a
b
(2)
3
3
4
u
×
10
u
3
3
6
=
4
u
×
10
u
=
40
u
(3)
2
−4
u
v
×
(
−9
)
v
2
3
=
−4
u
v
×
(
−9
)
v
=
36
u
v
(4)
3
8
a
b
×
5
b
3
4
=
8
a
b
×
5
b
=
40
a
b
(5)
3
3
−6
a
b
×
3
a
3
3
6
=
−6
a
b
×
3
a
=
−18
a
b
(6)
3
−6
p
q
×
(
−4
)
q
3
4
=
−6
p
q
×
(
−4
)
q
=
24
p
q
(7)
2
10
u
×
(
−10
)
u
2
3
=
10
u
×
(
−10
)
u
=
−100
u
(8)
2
3
5
a
×
6
a
2
3
5
=
5
a
×
6
a
=
30
a
(9)
2
8
x
y
×
3
x
y
2
3
2
=
8
x
y
×
3
x
y
=
24
x
y
(10)
2
2
3
−4
a
b
×
9
a
b
2
2
3
5
3
=
−4
a
b
×
9
a
b
=
−36
a
b
(11)
2
2
10
u
×
(
−3
)
u
2
2
4
=
10
u
×
(
−3
)
u
=
−30
u
(12)
3
−9
x
y
×
7
x
3
2
3
=
−9
x
y
×
7
x
=
−63
x
y
(13)
3
2
5
u
v
×
6
v
3
2
5
=
5
u
v
×
6
v
=
30
u
v
(14)
3
2
−10
p
q
×
(
−2
)
q
3
2
5
=
−10
p
q
×
(
−2
)
q
=
20
p
q
(15)
3
3
p
q
×
(
−9
)
p
3
4
=
3
p
q
×
(
−9
)
p
=
−27
p
q
(16)
2
3
−2
a
×
(
−7
)
a
2
3
5
=
−2
a
×
(
−7
)
a
=
14
a