问题
填空题
按规律填数
①306090____________
②666555444____________.
答案
①90+30=120,
120+30=150;
②444-111=333,
333-111=222;
故答案为:120,150,333,222.
按规律填数
①306090____________
②666555444____________.
①90+30=120,
120+30=150;
②444-111=333,
333-111=222;
故答案为:120,150,333,222.