Find the common difference. From 2780 to 1780 is 1000 over 2 steps.
• Common difference = 1000 ÷ 2 = 500, decreasing
• The pattern decreases by 500 each step.
• First blank: 2780 − 500 = 2280
• Second blank: 1780 − 500 = 1280
• Check: 1280 − 500 = 780 ✓ ; 780 − 500 = 280 ✓
Final Answer: 2280, 1280