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©2024 数学クラブ http://sugaku.club/
月 日( )
● 分配法則
[3D0-00]
(1)
(
−5
+
1
)
×
6
=
×
6
+
1
×
6
(2)
−10
×
(
−5
+
10
)
=
−10
×
+
(
−10
)
×
10
(3)
{
−4
+
(
−9
)
}
×
6
=
−4
×
+
(
−9
)
×
(4)
{
−6
+
(
−3
)
}
×
6
=
−6
×
+
(
−3
)
×
(5)
4
×
{
7
+
(
−1
)
}
=
4
×
7
+
4
×
(6)
7
×
{
−10
+
(
−9
)
}
=
7
×
+
7
×
(
−9
)
(7)
6
×
(
−1
+
7
)
=
6
×
(
−1
)
+
6
×
(8)
3
×
(
8
+
9
)
=
3
×
+
3
×
9
©2024 数学クラブ http://sugaku.club/
月 日( )
【解答例】
(1)
(
−5
)
(
−5
+
1
)
×
6
=
×
6
+
1
×
6
(2)
(
−5
)
−10
×
(
−5
+
10
)
=
−10
×
+
(
−10
)
×
10
(3)
6
6
{
−4
+
(
−9
)
}
×
6
=
−4
×
+
(
−9
)
×
(4)
6
6
{
−6
+
(
−3
)
}
×
6
=
−6
×
+
(
−3
)
×
(5)
−1
4
×
{
7
+
(
−1
)
}
=
4
×
7
+
4
×
(6)
(
−10
)
7
×
{
−10
+
(
−9
)
}
=
7
×
+
7
×
(
−9
)
(7)
(
7
)
6
×
(
−1
+
7
)
=
6
×
(
−1
)
+
6
×
(8)
8
3
×
(
8
+
9
)
=
3
×
+
3
×
9