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©2019 数学クラブ http://sugaku.club/
月 日（ ）
● 次の計算をしましょう
[160-00]
(1)
2
6
a
×
(
−4
)
a
(2)
−5
x
×
(
−5
)
x
(3)
3
−8
u
×
(
−2
)
u
(4)
−4
p
×
(
−5
)
q
(5)
3
−5
x
×
7
x
(6)
3
−7
x
×
(
−3
)
z
(7)
−7
a
×
8
c
(8)
2
−10
p
×
6
p
(9)
2
7
p
×
7
p
(10)
2
6
u
×
10
w
(11)
9
x
×
10
x
(12)
−6
p
×
4
p
(13)
2
7
p
×
8
p
(14)
2
−4
u
×
(
−8
)
w
(15)
3
−3
p
×
(
−5
)
q
(16)
3
−3
u
×
3
v
©2019 数学クラブ http://sugaku.club/
月 日（ ）
【解答例】
(1)
2
6
a
×
(
−4
)
a
3
=
−24
a
(2)
−5
x
×
(
−5
)
x
2
=
25
x
(3)
3
−8
u
×
(
−2
)
u
4
=
16
u
(4)
−4
p
×
(
−5
)
q
=
20
p
q
(5)
3
−5
x
×
7
x
4
=
−35
x
(6)
3
−7
x
×
(
−3
)
z
3
=
21
x
z
(7)
−7
a
×
8
c
=
−56
a
c
(8)
2
−10
p
×
6
p
3
=
−60
p
(9)
2
7
p
×
7
p
3
=
49
p
(10)
2
6
u
×
10
w
2
=
60
u
w
(11)
9
x
×
10
x
2
=
90
x
(12)
−6
p
×
4
p
2
=
−24
p
(13)
2
7
p
×
8
p
3
=
56
p
(14)
2
−4
u
×
(
−8
)
w
2
=
32
u
w
(15)
3
−3
p
×
(
−5
)
q
3
=
15
p
q
(16)
3
−3
u
×
3
v
3
=
−9
u
v