[文字サイズの変更]
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▲
©2025 数学クラブ http://sugaku.club/
月 日( )
● 乗法の交換法則
[06F-00]
(1)
(
+
6
)
×
(
+
1
)
=
(
+
1
)
×
(
)
(2)
(
+
4
)
×
(
+
6
)
=
(
)
×
(
+
4
)
(3)
(
+
4
)
×
(
+
10
)
=
(
)
×
(
+
4
)
(4)
(
+
6
)
×
(
−3
)
=
(
)
×
(
+
6
)
(5)
(
+
5
)
×
(
+
6
)
=
(
+
6
)
×
(
)
(6)
(
+
10
)
×
(
+
1
)
=
(
+
1
)
×
(
)
(7)
(
−2
)
×
(
+
8
)
=
(
+
8
)
×
(
)
(8)
(
+
5
)
×
(
+
3
)
=
(
+
3
)
×
(
)
©2025 数学クラブ http://sugaku.club/
月 日( )
【解答例】
(1)
+
6
(
+
6
)
×
(
+
1
)
=
(
+
1
)
×
(
)
(2)
+
6
(
+
4
)
×
(
+
6
)
=
(
)
×
(
+
4
)
(3)
+
10
(
+
4
)
×
(
+
10
)
=
(
)
×
(
+
4
)
(4)
−3
(
+
6
)
×
(
−3
)
=
(
)
×
(
+
6
)
(5)
+
5
(
+
5
)
×
(
+
6
)
=
(
+
6
)
×
(
)
(6)
+
10
(
+
10
)
×
(
+
1
)
=
(
+
1
)
×
(
)
(7)
−2
(
−2
)
×
(
+
8
)
=
(
+
8
)
×
(
)
(8)
+
5
(
+
5
)
×
(
+
3
)
=
(
+
3
)
×
(
)