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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
[160-00]
(1)
−3
x
×
8
y
(2)
3
7
p
×
(
−4
)
r
(3)
7
x
×
2
x
(4)
−9
p
×
(
−7
)
p
(5)
2
−6
a
×
(
−4
)
a
(6)
−8
p
×
(
−6
)
p
(7)
5
x
×
10
x
(8)
2
−6
a
×
4
c
(9)
3
4
a
×
6
c
(10)
2
a
×
6
c
(11)
10
u
×
(
−5
)
u
(12)
2
u
×
7
u
(13)
−5
u
×
(
−10
)
w
(14)
2
9
a
×
(
−2
)
a
(15)
3
10
x
×
2
y
(16)
−8
u
×
8
w
©2026 数学クラブ http://sugaku.club/
月 日（ ）
【解答例】
(1)
−3
x
×
8
y
=
−24
x
y
(2)
3
7
p
×
(
−4
)
r
3
=
−28
p
r
(3)
7
x
×
2
x
2
=
14
x
(4)
−9
p
×
(
−7
)
p
2
=
63
p
(5)
2
−6
a
×
(
−4
)
a
3
=
24
a
(6)
−8
p
×
(
−6
)
p
2
=
48
p
(7)
5
x
×
10
x
2
=
50
x
(8)
2
−6
a
×
4
c
2
=
−24
a
c
(9)
3
4
a
×
6
c
3
=
24
a
c
(10)
2
a
×
6
c
=
12
a
c
(11)
10
u
×
(
−5
)
u
2
=
−50
u
(12)
2
u
×
7
u
2
=
14
u
(13)
−5
u
×
(
−10
)
w
=
50
u
w
(14)
2
9
a
×
(
−2
)
a
3
=
−18
a
(15)
3
10
x
×
2
y
3
=
20
x
y
(16)
−8
u
×
8
w
=
−64
u
w