Round each number to the nearest thousand, then subtract.
• 9300: hundreds digit is 3 (3 < 5), round down → 9000
• 5260: hundreds digit is 2 (2 < 5), round down → 5000
• 1508: hundreds digit is 5 (5 ≥ 5), round up → 2000
• Estimate: 9000 − 5000 − 2000 = 2000
Final Answer: 9000 − 5000 − 2000 = 2000