［文字サイズの変更］
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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
−2
u
×
(
−4
)
u
(2)
2
2
7
u
v
×
5
u
v
(3)
3
3
u
×
(
−8
)
u
(4)
3
2
−9
x
×
8
x
(5)
2
3
−8
x
×
6
x
(6)
2
3
4
p
×
8
p
(7)
2
3
−9
a
×
(
−10
)
a
(8)
2
3
3
p
q
×
9
p
q
(9)
3
3
5
u
×
6
u
(10)
2
6
p
q
×
2
p
(11)
3
2
−10
x
×
(
−3
)
x
(12)
3
3
3
−6
a
b
×
5
b
c
(13)
2
3
−5
p
q
×
10
q
(14)
2
4
p
q
×
6
p
(15)
2
2
3
a
×
4
a
(16)
3
7
p
q
×
2
p
©2025 数学クラブ http://sugaku.club/
月 日（ ）
【解答例】
(1)
3
−2
u
×
(
−4
)
u
3
4
=
−2
u
×
(
−4
)
u
=
8
u
(2)
2
2
7
u
v
×
5
u
v
2
2
3
3
=
7
u
v
×
5
u
v
=
35
u
v
(3)
3
3
u
×
(
−8
)
u
3
4
=
3
u
×
(
−8
)
u
=
−24
u
(4)
3
2
−9
x
×
8
x
3
2
5
=
−9
x
×
8
x
=
−72
x
(5)
2
3
−8
x
×
6
x
2
3
5
=
−8
x
×
6
x
=
−48
x
(6)
2
3
4
p
×
8
p
2
3
5
=
4
p
×
8
p
=
32
p
(7)
2
3
−9
a
×
(
−10
)
a
2
3
5
=
−9
a
×
(
−10
)
a
=
90
a
(8)
2
3
3
p
q
×
9
p
q
2
3
4
3
=
3
p
q
×
9
p
q
=
27
p
q
(9)
3
3
5
u
×
6
u
3
3
6
=
5
u
×
6
u
=
30
u
(10)
2
6
p
q
×
2
p
2
3
=
6
p
q
×
2
p
=
12
p
q
(11)
3
2
−10
x
×
(
−3
)
x
3
2
5
=
−10
x
×
(
−3
)
x
=
30
x
(12)
3
3
3
−6
a
b
×
5
b
c
3
3
3
3
6
=
−6
a
b
×
5
b
c
=
−30
a
b
c
(13)
2
3
−5
p
q
×
10
q
2
3
5
=
−5
p
q
×
10
q
=
−50
p
q
(14)
2
4
p
q
×
6
p
2
3
=
4
p
q
×
6
p
=
24
p
q
(15)
2
2
3
a
×
4
a
2
2
4
=
3
a
×
4
a
=
12
a
(16)
3
7
p
q
×
2
p
3
4
=
7
p
q
×
2
p
=
14
p
q