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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
[160-00]
(1)
3
u
×
(
−2
)
v
(2)
9
x
×
(
−2
)
y
(3)
3
−10
u
×
7
v
(4)
2
−5
x
×
(
−7
)
z
(5)
−2
a
×
(
−4
)
a
(6)
10
a
×
(
−8
)
b
(7)
−10
p
×
(
−3
)
q
(8)
2
5
x
×
5
x
(9)
3
5
x
×
5
y
(10)
2
−2
u
×
(
−3
)
w
(11)
2
4
a
×
(
−5
)
a
(12)
3
6
x
×
6
y
(13)
2
7
u
×
7
v
(14)
2
−9
a
×
5
a
(15)
2
−7
u
×
(
−2
)
v
(16)
3
−2
u
×
(
−9
)
v
©2025 数学クラブ http://sugaku.club/
月 日( )
【解答例】
(1)
3
u
×
(
−2
)
v
=
−6
u
v
(2)
9
x
×
(
−2
)
y
=
−18
x
y
(3)
3
−10
u
×
7
v
3
=
−70
u
v
(4)
2
−5
x
×
(
−7
)
z
2
=
35
x
z
(5)
−2
a
×
(
−4
)
a
2
=
8
a
(6)
10
a
×
(
−8
)
b
=
−80
a
b
(7)
−10
p
×
(
−3
)
q
=
30
p
q
(8)
2
5
x
×
5
x
3
=
25
x
(9)
3
5
x
×
5
y
3
=
25
x
y
(10)
2
−2
u
×
(
−3
)
w
2
=
6
u
w
(11)
2
4
a
×
(
−5
)
a
3
=
−20
a
(12)
3
6
x
×
6
y
3
=
36
x
y
(13)
2
7
u
×
7
v
2
=
49
u
v
(14)
2
−9
a
×
5
a
3
=
−45
a
(15)
2
−7
u
×
(
−2
)
v
2
=
14
u
v
(16)
3
−2
u
×
(
−9
)
v
3
=
18
u
v