1) 99 ≈ 100
998 ≈ 1,000
99,998 ≈ 100,000
99,999,997 ≈ 100,000,000
2) 99 ≈ 100
998 ≈ 100
3) 9,999,998 ≈ 10,000,000
99,999,998 ≈ 100,000,000
999,999,999,997 ≈ 1,000,000,000,000
1) 99 ≈ 100
998 ≈ 1,000
99,998 ≈ 100,000
99,999,997 ≈ 100,000,000
2) 99 ≈ 100
998 ≈ 100
99,998 ≈ 100,000
99,999,997 ≈ 100,000,000
3) 9,999,998 ≈ 10,000,000
99,999,998 ≈ 100,000,000
999,999,999,997 ≈ 1,000,000,000,000