2☆3=2X3X4,4☆2=4X5,则:(5☆3)—(6☆2)=( )
问题描述:
2☆3=2X3X4,4☆2=4X5,则:(5☆3)—(6☆2)=( )
这题我不会,拜托各位拉,最好详细点!
答
2☆3=2X3X4,4☆2=4X5,
则:(5☆3)—(6☆2)
=5X6X7-6X7
=(5-1)X6X7
=4X42
=168