［文字サイズの変更］
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©2025 数学クラブ http://sugaku.club/
月 日（ ）
● 分配法則
[3D0-00]
(1)
−2
×
(
2
＋
6
)
=
×
2
＋
×
6
(2)
(
6
＋
2
)
×
9
=
6
×
＋
2
×
(3)
{
2
＋
(
−7
)
}
×
7
=
2
×
＋
(
−7
)
×
(4)
(
1
＋
3
)
×
(
−5
)
=
1
×
(
−5
)
＋
×
(
−5
)
(5)
−4
×
(
10
＋
4
)
=
−4
×
＋
(
−4
)
×
4
(6)
(
−7
＋
1
)
×
8
=
−7
×
＋
1
×
(7)
5
×
{
2
＋
(
−5
)
}
=
5
×
＋
5
×
(
−5
)
(8)
(
6
＋
7
)
×
8
=
6
×
＋
7
×
©2025 数学クラブ http://sugaku.club/
月 日（ ）
【解答例】
(1)
(
−2
)
(
−2
)
−2
×
(
2
＋
6
)
=
×
2
＋
×
6
(2)
9
9
(
6
＋
2
)
×
9
=
6
×
＋
2
×
(3)
7
7
{
2
＋
(
−7
)
}
×
7
=
2
×
＋
(
−7
)
×
(4)
3
(
1
＋
3
)
×
(
−5
)
=
1
×
(
−5
)
＋
×
(
−5
)
(5)
10
−4
×
(
10
＋
4
)
=
−4
×
＋
(
−4
)
×
4
(6)
8
8
(
−7
＋
1
)
×
8
=
−7
×
＋
1
×
(7)
2
5
×
{
2
＋
(
−5
)
}
=
5
×
＋
5
×
(
−5
)
(8)
8
8
(
6
＋
7
)
×
8
=
6
×
＋
7
×