Calculate: \( 261+0 \) \( (0 \times 57)+(0 \div 65) \)

When you add \( 261 + 0 \), the sum remains \( 261 \). Zero has a special role in arithmetic: it acts as the neutral element in addition, so adding it to any number does not change that number. As for the expression \( (0 \times 57) + (0 \div 65) \), we first evaluate each part. Multiplying any number by zero gives \( 0 \), and division of zero by any non-zero number is also \( 0 \). Therefore, \( 0 + 0 = 0 \).