找规律填数. 1.5,2.3,3.1,( ),( ). 30,29.3,28.6,27.9,( ),( ).1.15,2.3,4.6,( ),( ).
问题描述:
找规律填数. 1.5,2.3,3.1,( ),( ). 30,29.3,28.6,27.9,( ),( ).
1.15,2.3,4.6,( ),( ).
答
1.5,2.3,3.1,(3.9 ),(4.7 ).
30,29.3,28.6,27.9,(27.2 ),(26.5 ).
1.15,2.3,4.6,(9.2 ),(18.4 ).