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©2024 数学クラブ http://sugaku.club/
月 日（ ）
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[161-00]
(1)
−10
a
b
×
(
−10
)
b
(2)
3
2
3
a
b
×
5
b
(3)
3
3
−5
x
×
(
−2
)
x
(4)
3
3
−3
a
×
2
a
(5)
3
3
6
x
y
×
4
x
(6)
3
2
2
u
v
×
7
v
(7)
2
10
x
y
×
6
y
(8)
2
−10
a
b
×
(
−4
)
b
c
(9)
3
2
−5
u
×
(
−9
)
u
(10)
3
3
2
a
×
10
a
(11)
2
2
−2
p
×
5
p
(12)
2
2
−5
x
×
(
−10
)
x
(13)
2
2
−8
x
×
(
−4
)
x
(14)
3
3
−3
a
×
(
−9
)
a
(15)
2
3
3
−5
p
q
×
10
p
q
(16)
2
10
x
y
×
2
y
z
©2024 数学クラブ http://sugaku.club/
月 日（ ）
【解答例】
(1)
−10
a
b
×
(
−10
)
b
2
=
−10
a
b
×
(
−10
)
b
=
100
a
b
(2)
3
2
3
a
b
×
5
b
3
2
3
3
=
3
a
b
×
5
b
=
15
a
b
(3)
3
3
−5
x
×
(
−2
)
x
3
3
6
=
−5
x
×
(
−2
)
x
=
10
x
(4)
3
3
−3
a
×
2
a
3
3
6
=
−3
a
×
2
a
=
−6
a
(5)
3
3
6
x
y
×
4
x
3
3
4
3
=
6
x
y
×
4
x
=
24
x
y
(6)
3
2
2
u
v
×
7
v
3
2
5
=
2
u
v
×
7
v
=
14
u
v
(7)
2
10
x
y
×
6
y
2
3
=
10
x
y
×
6
y
=
60
x
y
(8)
2
−10
a
b
×
(
−4
)
b
c
2
3
=
−10
a
b
×
(
−4
)
b
c
=
40
a
b
c
(9)
3
2
−5
u
×
(
−9
)
u
3
2
5
=
−5
u
×
(
−9
)
u
=
45
u
(10)
3
3
2
a
×
10
a
3
3
6
=
2
a
×
10
a
=
20
a
(11)
2
2
−2
p
×
5
p
2
2
4
=
−2
p
×
5
p
=
−10
p
(12)
2
2
−5
x
×
(
−10
)
x
2
2
4
=
−5
x
×
(
−10
)
x
=
50
x
(13)
2
2
−8
x
×
(
−4
)
x
2
2
4
=
−8
x
×
(
−4
)
x
=
32
x
(14)
3
3
−3
a
×
(
−9
)
a
3
3
6
=
−3
a
×
(
−9
)
a
=
27
a
(15)
2
3
3
−5
p
q
×
10
p
q
2
3
3
5
4
=
−5
p
q
×
10
p
q
=
−50
p
q
(16)
2
10
x
y
×
2
y
z
2
3
=
10
x
y
×
2
y
z
=
20
x
y
z