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©2018 数学クラブ http://sugaku.club/
月 日（ ）
● 次の計算をしましょう
[160-00]
(1)
−5
x
×
(
−5
)
x
(2)
3
3
p
×
(
−9
)
r
(3)
2
−6
a
×
(
−8
)
b
(4)
3
2
u
×
2
w
(5)
4
x
×
8
x
(6)
2
−8
a
×
9
a
(7)
3
−9
x
×
(
−2
)
y
(8)
3
3
p
×
5
r
(9)
−5
p
×
8
p
(10)
−9
a
×
2
c
(11)
−7
x
×
(
−8
)
z
(12)
3
8
x
×
10
z
(13)
−8
u
×
(
−8
)
u
(14)
3
−9
p
×
7
r
(15)
3
p
×
(
−3
)
q
(16)
−10
p
×
4
p
©2018 数学クラブ http://sugaku.club/
月 日（ ）
【解答例】
(1)
−5
x
×
(
−5
)
x
2
=
25
x
(2)
3
3
p
×
(
−9
)
r
3
=
−27
p
r
(3)
2
−6
a
×
(
−8
)
b
2
=
48
a
b
(4)
3
2
u
×
2
w
3
=
4
u
w
(5)
4
x
×
8
x
2
=
32
x
(6)
2
−8
a
×
9
a
3
=
−72
a
(7)
3
−9
x
×
(
−2
)
y
3
=
18
x
y
(8)
3
3
p
×
5
r
3
=
15
p
r
(9)
−5
p
×
8
p
2
=
−40
p
(10)
−9
a
×
2
c
=
−18
a
c
(11)
−7
x
×
(
−8
)
z
=
56
x
z
(12)
3
8
x
×
10
z
3
=
80
x
z
(13)
−8
u
×
(
−8
)
u
2
=
64
u
(14)
3
−9
p
×
7
r
3
=
−63
p
r
(15)
3
p
×
(
−3
)
q
=
−9
p
q
(16)
−10
p
×
4
p
2
=
−40
p