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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)
8
a
×
(
−7
)
a
(2)
3
−8
u
×
(
−3
)
w
(3)
2
4
p
×
(
−7
)
r
(4)
−9
x
×
8
x
(5)
3
−4
x
×
8
x
(6)
2
p
×
4
q
(7)
2
6
p
×
(
−9
)
r
(8)
2
−3
a
×
(
−7
)
a
(9)
2
x
×
2
y
(10)
2
4
u
×
(
−5
)
v
(11)
2
−6
x
×
(
−3
)
x
(12)
−2
a
×
(
−7
)
b
(13)
−4
a
×
(
−9
)
b
(14)
2
4
p
×
10
p
(15)
7
p
×
(
−8
)
p
(16)
2
4
a
×
5
a
©2025 数学クラブ http://sugaku.club/
月 日（ ）
【解答例】
(1)
8
a
×
(
−7
)
a
2
=
−56
a
(2)
3
−8
u
×
(
−3
)
w
3
=
24
u
w
(3)
2
4
p
×
(
−7
)
r
2
=
−28
p
r
(4)
−9
x
×
8
x
2
=
−72
x
(5)
3
−4
x
×
8
x
4
=
−32
x
(6)
2
p
×
4
q
=
8
p
q
(7)
2
6
p
×
(
−9
)
r
2
=
−54
p
r
(8)
2
−3
a
×
(
−7
)
a
3
=
21
a
(9)
2
x
×
2
y
=
4
x
y
(10)
2
4
u
×
(
−5
)
v
2
=
−20
u
v
(11)
2
−6
x
×
(
−3
)
x
3
=
18
x
(12)
−2
a
×
(
−7
)
b
=
14
a
b
(13)
−4
a
×
(
−9
)
b
=
36
a
b
(14)
2
4
p
×
10
p
3
=
40
p
(15)
7
p
×
(
−8
)
p
2
=
−56
p
(16)
2
4
a
×
5
a
3
=
20
a