Răspuns:
Explicație pas cu pas:
a) 19994,19995,19996,19997,19998,19999,20000,20001,20002,20003
b)876532,876530,876528,876526,876524,876522
c)19992,19993,19994,19995,19996,19997,19998,19999,20000,20001,20002,20003
20204,20203,20202,20201,20200,20199
d)790 007,790 006, 790 005,790 004 790 003, 790 002,790 001, 790 001,
790 000, 789 999, 789 998, 789 997
