Bài 2: Số ?

a) 400; 500; ...;...; 800; 900;...

b) 910; 920; 930;...; ...; ...; 970;...;990;....

c)212; 213; 214;...;....;217; 218;...;....;...;

c) 693; 694; ....;....;...;701.

Lời Giải:

Bài 2:

a) 400, 500, 600, 700, 800, 900, 1000

b) 910, 920, 930, 940, 950, 960, 970, 980, 990, 1000

c) 212, 213, 214, 215, 216, 217, 218, 219, 220, 221

d) 693, 694, 695, 696, 697, 698, 699, 700, 701