6554+7658

14,212

Quick check (column addition):

• 4 + 8 = 12 -> write 2, carry 1
• 5 + 5 + 1 = 11 -> write 1, carry 1
• 5 + 6 + 1 = 12 -> write 2, carry 1
• 6 + 7 + 1 = 14 -> write 4, carry 1
• carry 1 becomes the ten-thousands digit: 1

So the sum is 14,212.