［文字サイズの変更］
▼
▲
©2025 数学クラブ http://sugaku.club/
月 日（ ）
● 次の計算をしましょう
[161-00]
(1)
3
−9
p
×
10
p
(2)
3
3
−8
p
×
2
p
(3)
3
3
5
x
y
×
5
x
y
(4)
3
9
u
v
×
(
−3
)
u
(5)
2
3
−7
p
×
(
−2
)
p
(6)
3
8
x
y
×
(
−5
)
y
(7)
3
2
−10
x
×
(
−2
)
x
(8)
2
−9
a
b
×
3
a
(9)
2
2
−6
x
y
×
9
y
z
(10)
3
3
7
u
×
8
u
(11)
3
3
−6
u
v
×
(
−5
)
v
w
(12)
2
3
2
a
×
7
a
(13)
2
2
−4
u
v
×
(
−7
)
u
(14)
2
2
6
x
×
(
−8
)
x
(15)
2
3
7
p
×
(
−5
)
p
(16)
2
2
5
u
×
8
u
©2025 数学クラブ http://sugaku.club/
月 日（ ）
【解答例】
(1)
3
−9
p
×
10
p
3
4
=
−9
p
×
10
p
=
−90
p
(2)
3
3
−8
p
×
2
p
3
3
6
=
−8
p
×
2
p
=
−16
p
(3)
3
3
5
x
y
×
5
x
y
3
3
6
2
=
5
x
y
×
5
x
y
=
25
x
y
(4)
3
9
u
v
×
(
−3
)
u
3
4
=
9
u
v
×
(
−3
)
u
=
−27
u
v
(5)
2
3
−7
p
×
(
−2
)
p
2
3
5
=
−7
p
×
(
−2
)
p
=
14
p
(6)
3
8
x
y
×
(
−5
)
y
3
4
=
8
x
y
×
(
−5
)
y
=
−40
x
y
(7)
3
2
−10
x
×
(
−2
)
x
3
2
5
=
−10
x
×
(
−2
)
x
=
20
x
(8)
2
−9
a
b
×
3
a
2
2
2
=
−9
a
b
×
3
a
=
−27
a
b
(9)
2
2
−6
x
y
×
9
y
z
2
2
4
=
−6
x
y
×
9
y
z
=
−54
x
y
z
(10)
3
3
7
u
×
8
u
3
3
6
=
7
u
×
8
u
=
56
u
(11)
3
3
−6
u
v
×
(
−5
)
v
w
3
3
3
4
=
−6
u
v
×
(
−5
)
v
w
=
30
u
v
w
(12)
2
3
2
a
×
7
a
2
3
5
=
2
a
×
7
a
=
14
a
(13)
2
2
−4
u
v
×
(
−7
)
u
2
2
4
=
−4
u
v
×
(
−7
)
u
=
28
u
v
(14)
2
2
6
x
×
(
−8
)
x
2
2
4
=
6
x
×
(
−8
)
x
=
−48
x
(15)
2
3
7
p
×
(
−5
)
p
2
3
5
=
7
p
×
(
−5
)
p
=
−35
p
(16)
2
2
5
u
×
8
u
2
2
4
=
5
u
×
8
u
=
40
u