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©2026 数学クラブ http://sugaku.club/
月 日（ ）
● 次の計算をしましょう
[161-00]
(1)
3
2
6
a
×
(
−6
)
a
(2)
3
3
6
p
×
(
−6
)
p
(3)
3
3
−4
a
×
8
a
(4)
3
3
x
y
×
10
x
y
(5)
−8
x
y
×
(
−3
)
x
(6)
−2
a
b
×
(
−10
)
a
(7)
3
3
3
5
a
b
×
(
−3
)
b
c
(8)
3
2
−10
p
×
(
−5
)
p
(9)
2
2
9
p
q
×
4
p
q
(10)
2
2
7
x
×
5
x
(11)
2
2
−7
u
×
8
u
(12)
3
−10
p
q
×
(
−9
)
p
q
(13)
3
2
8
p
×
(
−3
)
p
(14)
2
2
−8
p
×
6
p
(15)
3
3
8
x
y
×
10
x
y
(16)
3
3
7
p
×
(
−5
)
p
©2026 数学クラブ http://sugaku.club/
月 日（ ）
【解答例】
(1)
3
2
6
a
×
(
−6
)
a
3
2
5
=
6
a
×
(
−6
)
a
=
−36
a
(2)
3
3
6
p
×
(
−6
)
p
3
3
6
=
6
p
×
(
−6
)
p
=
−36
p
(3)
3
3
−4
a
×
8
a
3
3
6
=
−4
a
×
8
a
=
−32
a
(4)
3
3
x
y
×
10
x
y
3
4
2
=
3
x
y
×
10
x
y
=
30
x
y
(5)
−8
x
y
×
(
−3
)
x
2
=
−8
x
y
×
(
−3
)
x
=
24
x
y
(6)
−2
a
b
×
(
−10
)
a
2
=
−2
a
b
×
(
−10
)
a
=
20
a
b
(7)
3
3
3
5
a
b
×
(
−3
)
b
c
3
3
3
3
6
=
5
a
b
×
(
−3
)
b
c
=
−15
a
b
c
(8)
3
2
−10
p
×
(
−5
)
p
3
2
5
=
−10
p
×
(
−5
)
p
=
50
p
(9)
2
2
9
p
q
×
4
p
q
2
2
3
3
=
9
p
q
×
4
p
q
=
36
p
q
(10)
2
2
7
x
×
5
x
2
2
4
=
7
x
×
5
x
=
35
x
(11)
2
2
−7
u
×
8
u
2
2
4
=
−7
u
×
8
u
=
−56
u
(12)
3
−10
p
q
×
(
−9
)
p
q
3
4
2
=
−10
p
q
×
(
−9
)
p
q
=
90
p
q
(13)
3
2
8
p
×
(
−3
)
p
3
2
5
=
8
p
×
(
−3
)
p
=
−24
p
(14)
2
2
−8
p
×
6
p
2
2
4
=
−8
p
×
6
p
=
−48
p
(15)
3
3
8
x
y
×
10
x
y
3
3
6
2
=
8
x
y
×
10
x
y
=
80
x
y
(16)
3
3
7
p
×
(
−5
)
p
3
3
6
=
7
p
×
(
−5
)
p
=
−35
p