1. The problem is to identify the long division sign used in school to solve division problems. 2. The long division sign is a symbol that looks like a right parenthesis with a horizontal bar extending to the left, often written as \(\overline{\div}\) or simply drawn as a division bracket. 3. It is used to divide one number (the dividend) by another (the divisor) step-by-step, showing intermediate subtraction and bringing down digits. 4. For example, to divide 123 by 4, you write 4 outside the division bracket and 123 inside, then proceed with the division steps. 5. This method helps visualize the division process clearly and is taught in elementary mathematics. Final answer: The long division sign is the division bracket symbol used to perform step-by-step division in school.