拓展练习
1.根据数或图形的排列规律,在括号里填上合适的数或图形。
〈1〉1,5,9,13,17, ( ) , ( ) 〈2〉19,16,13,10, ( ) , ( ) 〈3〉11,12,15,20,27, ( ) , ( ) 〈4〉5,7,10,14,19, ( ) , ( ) 〈5〉88,78,68,58,48, ( ) , ( ) 〈6〉 ——,——.
2.找规律填数或汉字 〈1〉3,5,3,10,3,15, ( ) , ( ) 〈2〉2,3,3,4,4,5, ( ) , ( ) 〈3〉5,10,8,18,14,29,23,43, ( ) , ( ) 〈4〉 ( ) , ( ) ,12,5,10,6,8,7 〈5〉2,6,18,54, ( ) 〈6〉2,3,5,9,17, ( ) , ( ) 〈7〉
3.找规律填数或图形 〈1〉2,3,5,3,8,3( ) , ( ) 〈2〉1,17,3,15,5,13,7, ( ) 〈3〉18,7,16,9,14,11, ( ) , ( ) 〈4〉0,2,2,4,6,10, ( ) , ( ) 〈5〉0,1,1,2,4,7,13, ( ) , ( ) 〈6〉1,1,4,2,9,3,16,4, ( ) , ( ) 〈7〉2,6,12,20,30,42, ( ) , ( ) 〈8〉1,2,5,14,41, ( ) 〈9〉