［文字サイズの変更］
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▲
©2026 数学クラブ http://sugaku.club/
月 日（ ）
● 分配法則
[3D0-00]
(1)
7
×
{
1
＋
(
−8
)
}
=
7
×
1
＋
7
×
(2)
5
×
(
6
＋
1
)
=
5
×
＋
5
×
1
(3)
8
×
(
−8
＋
6
)
=
8
×
(
−8
)
＋
8
×
(4)
−2
×
(
−5
＋
7
)
=
−2
×
(
−5
)
＋
(
−2
)
×
(5)
(
2
＋
6
)
×
(
−3
)
=
2
×
＋
6
×
(6)
{
−6
＋
(
−10
)
}
×
5
=
×
5
＋
(
−10
)
×
5
(7)
4
×
(
3
＋
9
)
=
×
3
＋
×
9
(8)
4
×
(
−5
＋
6
)
=
4
×
(
−5
)
＋
4
×
©2026 数学クラブ http://sugaku.club/
月 日（ ）
【解答例】
(1)
−8
7
×
{
1
＋
(
−8
)
}
=
7
×
1
＋
7
×
(2)
6
5
×
(
6
＋
1
)
=
5
×
＋
5
×
1
(3)
(
6
)
8
×
(
−8
＋
6
)
=
8
×
(
−8
)
＋
8
×
(4)
(
7
)
−2
×
(
−5
＋
7
)
=
−2
×
(
−5
)
＋
(
−2
)
×
(5)
(
−3
)
(
−3
)
(
2
＋
6
)
×
(
−3
)
=
2
×
＋
6
×
(6)
(
−6
)
{
−6
＋
(
−10
)
}
×
5
=
×
5
＋
(
−10
)
×
5
(7)
4
4
4
×
(
3
＋
9
)
=
×
3
＋
×
9
(8)
(
6
)
4
×
(
−5
＋
6
)
=
4
×
(
−5
)
＋
4
×