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©2024 数学クラブ http://sugaku.club/
月 日（ ）
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[161-00]
(1)
−9
a
b
×
(
−4
)
b
(2)
3
2
3
−5
x
y
×
10
x
y
(3)
3
−3
x
×
8
x
(4)
3
2
−4
p
×
(
−6
)
p
(5)
−2
a
b
×
4
b
(6)
3
3
4
u
×
(
−4
)
u
(7)
2
8
p
q
×
5
q
(8)
3
−9
a
b
×
10
b
(9)
2
9
a
b
×
9
a
b
(10)
2
8
a
b
×
(
−9
)
b
(11)
3
2
8
u
v
×
7
v
(12)
3
3
−8
p
×
7
p
(13)
2
2
−7
p
×
(
−2
)
p
(14)
2
8
x
×
(
−8
)
x
(15)
2
3
3
p
×
(
−10
)
p
(16)
3
−10
p
q
×
(
−10
)
q
r
©2024 数学クラブ http://sugaku.club/
月 日（ ）
【解答例】
(1)
−9
a
b
×
(
−4
)
b
2
=
−9
a
b
×
(
−4
)
b
=
36
a
b
(2)
3
2
3
−5
x
y
×
10
x
y
3
2
3
6
3
=
−5
x
y
×
10
x
y
=
−50
x
y
(3)
3
−3
x
×
8
x
3
4
=
−3
x
×
8
x
=
−24
x
(4)
3
2
−4
p
×
(
−6
)
p
3
2
5
=
−4
p
×
(
−6
)
p
=
24
p
(5)
−2
a
b
×
4
b
2
=
−2
a
b
×
4
b
=
−8
a
b
(6)
3
3
4
u
×
(
−4
)
u
3
3
6
=
4
u
×
(
−4
)
u
=
−16
u
(7)
2
8
p
q
×
5
q
2
3
=
8
p
q
×
5
q
=
40
p
q
(8)
3
−9
a
b
×
10
b
3
4
=
−9
a
b
×
10
b
=
−90
a
b
(9)
2
9
a
b
×
9
a
b
2
3
2
=
9
a
b
×
9
a
b
=
81
a
b
(10)
2
8
a
b
×
(
−9
)
b
2
2
2
=
8
a
b
×
(
−9
)
b
=
−72
a
b
(11)
3
2
8
u
v
×
7
v
3
2
3
3
=
8
u
v
×
7
v
=
56
u
v
(12)
3
3
−8
p
×
7
p
3
3
6
=
−8
p
×
7
p
=
−56
p
(13)
2
2
−7
p
×
(
−2
)
p
2
2
4
=
−7
p
×
(
−2
)
p
=
14
p
(14)
2
8
x
×
(
−8
)
x
2
3
=
8
x
×
(
−8
)
x
=
−64
x
(15)
2
3
3
p
×
(
−10
)
p
2
3
5
=
3
p
×
(
−10
)
p
=
−30
p
(16)
3
−10
p
q
×
(
−10
)
q
r
3
4
=
−10
p
q
×
(
−10
)
q
r
=
100
p
q
r