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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)
2
−4
a
×
(
−9
)
c
(2)
2
−9
x
×
4
z
(3)
2
3
a
×
(
−6
)
a
(4)
−6
a
×
(
−8
)
a
(5)
−10
p
×
7
r
(6)
3
8
u
×
(
−4
)
v
(7)
2
7
p
×
(
−4
)
r
(8)
2
8
x
×
8
x
(9)
8
a
×
(
−6
)
b
(10)
2
5
p
×
(
−10
)
p
(11)
3
x
×
8
y
(12)
5
a
×
9
b
(13)
7
u
×
5
v
(14)
3
−8
u
×
(
−9
)
w
(15)
3
7
u
×
(
−6
)
v
(16)
3
−4
a
×
(
−7
)
c
©2026 数学クラブ http://sugaku.club/
月 日（ ）
【解答例】
(1)
2
−4
a
×
(
−9
)
c
2
=
36
a
c
(2)
2
−9
x
×
4
z
2
=
−36
x
z
(3)
2
3
a
×
(
−6
)
a
3
=
−18
a
(4)
−6
a
×
(
−8
)
a
2
=
48
a
(5)
−10
p
×
7
r
=
−70
p
r
(6)
3
8
u
×
(
−4
)
v
3
=
−32
u
v
(7)
2
7
p
×
(
−4
)
r
2
=
−28
p
r
(8)
2
8
x
×
8
x
3
=
64
x
(9)
8
a
×
(
−6
)
b
=
−48
a
b
(10)
2
5
p
×
(
−10
)
p
3
=
−50
p
(11)
3
x
×
8
y
=
24
x
y
(12)
5
a
×
9
b
=
45
a
b
(13)
7
u
×
5
v
=
35
u
v
(14)
3
−8
u
×
(
−9
)
w
3
=
72
u
w
(15)
3
7
u
×
(
−6
)
v
3
=
−42
u
v
(16)
3
−4
a
×
(
−7
)
c
3
=
28
a
c