首页 > 留学知识库

问题: 能帮我算一下吗?,到底填什么啊?

1.2 4 8
2 5 10
2 6 12
2 7 ( )
( ) ( ) ( )




2.1 2 2
2 3 6
3 4 12
4 5 ( )
( )( ) ( )



3.1 4 3
2 5 9
3 6 17
4 7 ( )
( )( )( )

老师叫横着看,然后在填,但是到底怎么填啊,怎么算?

解答:

解:
2``2×2``2×2×2=8
2````5````2×5=10
2````6````2×6=12
2````7``(2×7=14)
2````8````2×8=16

同理
4````5````4×5=20
5````6````5×6=30

1````4````1×4-1=3
2````5````2×5-1=9
……………………
4````7````4×7-1=27
5````8````5×8-1=39