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©2026 数学クラブ http://sugaku.club/
月 日（ ）
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[161-00]
(1)
3
−3
p
×
(
−7
)
p
(2)
3
3
2
x
×
(
−7
)
x
(3)
2
3
−8
p
q
×
2
p
(4)
2
2
7
p
×
3
p
(5)
3
3
2
a
b
×
10
b
c
(6)
2
3
−9
x
×
(
−4
)
x
(7)
2
−4
p
×
(
−5
)
p
(8)
3
−8
p
×
5
p
(9)
2
2
−5
u
×
(
−6
)
u
(10)
3
−9
u
×
(
−2
)
u
(11)
3
3
2
3
u
v
×
(
−6
)
u
v
(12)
3
2
−7
p
q
×
(
−6
)
q
r
(13)
3
2
−3
p
×
(
−8
)
p
(14)
3
3
−6
x
y
×
(
−3
)
x
(15)
2
2
x
y
×
10
y
(16)
2
2
−7
a
b
×
3
b
c
©2026 数学クラブ http://sugaku.club/
月 日（ ）
【解答例】
(1)
3
−3
p
×
(
−7
)
p
3
4
=
−3
p
×
(
−7
)
p
=
21
p
(2)
3
3
2
x
×
(
−7
)
x
3
3
6
=
2
x
×
(
−7
)
x
=
−14
x
(3)
2
3
−8
p
q
×
2
p
2
3
3
3
=
−8
p
q
×
2
p
=
−16
p
q
(4)
2
2
7
p
×
3
p
2
2
4
=
7
p
×
3
p
=
21
p
(5)
3
3
2
a
b
×
10
b
c
3
3
3
4
=
2
a
b
×
10
b
c
=
20
a
b
c
(6)
2
3
−9
x
×
(
−4
)
x
2
3
5
=
−9
x
×
(
−4
)
x
=
36
x
(7)
2
−4
p
×
(
−5
)
p
2
3
=
−4
p
×
(
−5
)
p
=
20
p
(8)
3
−8
p
×
5
p
3
4
=
−8
p
×
5
p
=
−40
p
(9)
2
2
−5
u
×
(
−6
)
u
2
2
4
=
−5
u
×
(
−6
)
u
=
30
u
(10)
3
−9
u
×
(
−2
)
u
3
4
=
−9
u
×
(
−2
)
u
=
18
u
(11)
3
3
2
3
u
v
×
(
−6
)
u
v
3
3
2
5
4
=
3
u
v
×
(
−6
)
u
v
=
−18
u
v
(12)
3
2
−7
p
q
×
(
−6
)
q
r
3
2
5
=
−7
p
q
×
(
−6
)
q
r
=
42
p
q
r
(13)
3
2
−3
p
×
(
−8
)
p
3
2
5
=
−3
p
×
(
−8
)
p
=
24
p
(14)
3
3
−6
x
y
×
(
−3
)
x
3
3
4
3
=
−6
x
y
×
(
−3
)
x
=
18
x
y
(15)
2
2
x
y
×
10
y
2
3
=
2
x
y
×
10
y
=
20
x
y
(16)
2
2
−7
a
b
×
3
b
c
2
2
2
3
=
−7
a
b
×
3
b
c
=
−21
a
b
c