［文字サイズの変更］
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©2019 数学クラブ http://sugaku.club/
月 日（ ）
● 次の計算をしましょう
[161-00]
(1)
3
3
−9
p
×
9
p
(2)
3
3
−2
u
×
(
−5
)
u
(3)
2
2
x
y
×
(
−10
)
x
y
(4)
2
7
x
×
3
x
(5)
2
3
−3
a
×
(
−8
)
a
(6)
2
3
2
−10
p
q
×
9
q
(7)
3
2
−5
x
y
×
5
x
y
(8)
2
2
−3
x
×
10
x
(9)
2
2
−9
x
y
×
(
−5
)
y
z
(10)
3
3
a
b
×
(
−10
)
b
(11)
3
3
−9
a
b
×
6
b
c
(12)
2
2
10
p
×
5
p
(13)
2
2
−2
p
q
×
2
p
q
(14)
3
2
5
a
b
×
(
−9
)
a
b
(15)
2
2
2
−6
a
b
×
(
−10
)
b
c
(16)
2
3
2
−10
u
v
×
3
u
v
©2019 数学クラブ http://sugaku.club/
月 日（ ）
【解答例】
(1)
3
3
−9
p
×
9
p
3
3
6
=
−9
p
×
9
p
=
−81
p
(2)
3
3
−2
u
×
(
−5
)
u
3
3
6
=
−2
u
×
(
−5
)
u
=
10
u
(3)
2
2
x
y
×
(
−10
)
x
y
2
3
2
=
2
x
y
×
(
−10
)
x
y
=
−20
x
y
(4)
2
7
x
×
3
x
2
3
=
7
x
×
3
x
=
21
x
(5)
2
3
−3
a
×
(
−8
)
a
2
3
5
=
−3
a
×
(
−8
)
a
=
24
a
(6)
2
3
2
−10
p
q
×
9
q
2
3
2
2
5
=
−10
p
q
×
9
q
=
−90
p
q
(7)
3
2
−5
x
y
×
5
x
y
3
2
3
4
=
−5
x
y
×
5
x
y
=
−25
x
y
(8)
2
2
−3
x
×
10
x
2
2
4
=
−3
x
×
10
x
=
−30
x
(9)
2
2
−9
x
y
×
(
−5
)
y
z
2
2
4
=
−9
x
y
×
(
−5
)
y
z
=
45
x
y
z
(10)
3
3
a
b
×
(
−10
)
b
3
4
=
3
a
b
×
(
−10
)
b
=
−30
a
b
(11)
3
3
−9
a
b
×
6
b
c
3
3
6
=
−9
a
b
×
6
b
c
=
−54
a
b
c
(12)
2
2
10
p
×
5
p
2
2
4
=
10
p
×
5
p
=
50
p
(13)
2
2
−2
p
q
×
2
p
q
2
2
4
2
=
−2
p
q
×
2
p
q
=
−4
p
q
(14)
3
2
5
a
b
×
(
−9
)
a
b
3
2
3
4
=
5
a
b
×
(
−9
)
a
b
=
−45
a
b
(15)
2
2
2
−6
a
b
×
(
−10
)
b
c
2
2
2
2
4
=
−6
a
b
×
(
−10
)
b
c
=
60
a
b
c
(16)
2
3
2
−10
u
v
×
3
u
v
2
3
2
4
4
=
−10
u
v
×
3
u
v
=
−30
u
v