Calculate: 260 * 403 - (568 * 5 - 1840)

Solution:

1. Calculate the terms within the parentheses first:
• $$568 \times 5 = 2840$$
• $$2840 - 1840 = 1000$$
2. Calculate the first multiplication:
• $$260 \times 403 = 104780$$
3. Perform the subtraction:
• $$104780 - 1000 = 103780$$

$$ 260 \times 403 - (568 \times 5 - 1840) = 104780 - (2840 - 1840) = 104780 - 1000 = 103780 $$

Answer: 103780