Find the common difference. From 3000 to 2200 is 800 over 2 steps.
• Common difference = 800 ÷ 2 = 400, decreasing
• The pattern decreases by 400 each step.
• First blank: 3000 − 400 = 2600
• Second blank: 2200 − 400 = 1800
• Check: 1800 − 400 = 1400 ✓ ; 1400 − 400 = 1000 ✓
Final Answer: 2600, 1800