Find the common difference. From 5500 to 5100 is 400 over 2 steps.
• Common difference = 400 ÷ 2 = 200, decreasing
• The pattern decreases by 200 each step.
• First blank: 5500 − 200 = 5300
• Second blank: 5100 − 200 = 4900
• Check: 4900 − 200 = 4700 ✓ ; 4700 − 200 = 4500 ✓
Final Answer: 5300, 4900