Răspuns :
10^2 - 10^0 = 100 - 1 = 99
10^3 + 10^0 = 1000 + 1 = 1001
10^3 - 10^1 = 1000 - 1 = 999
10^5 + 10^1 = 100,000 + 10 = 100,010
10^3 - 10^2 = 1000 - 100 = 900
10^4 + 10^3 = 10,000 + 1000 = 11,000
10^5 - 10^2 = 100,000 - 100 = 99,900
10^5 + 10^3 = 100,000 - 1000 = 99,000