探究规律下面有8个算式,排成4行2列: 2+ 2 1 , 2× 2 1 ; 3+ 3 2 , 3

2025-04-30 10:43:15
推荐回答(1个)
回答1:

(1)2+
2
1
=4,2×
2
1
=4,
3+
3
2
=
9
2
,3×
3
2
=
9
2

4+
4
3
=
16
3
,4×
4
3
=
16
3

5+
5
4
=
25
4
,5×
5
4
=
25
4

都相等;

(2)2010+
2010
2009
=
2010×2009
2009
+
2010
2009
=
2010 2
2009

2010×
2010
2009
=
2010 2
2009

所以,相等;
故答案为:(1)相等;(2)相等;

(3)不难发现,n+
n
n-1
=n?
n
n-1