1. Problem: Perform long division of 1548 by 12. 2. Formula: Division is splitting a number into equal parts. Here, $1548 \div 12$. 3. Step-by-step: - Divide 15 by 12, quotient 1, remainder 3. - Bring down 4, now 34. - Divide 34 by 12, quotient 2, remainder 10. - Bring down 8, now 108. - Divide 108 by 12, quotient 9, remainder 0. 4. Final answer: $1548 \div 12 = 129$. 1. Problem: Add 4567 and 2389 using column method. 2. Formula: Addition sums digits column-wise. 3. Step-by-step: - Units: $7 + 9 = 16$, write 6 carry 1. - Tens: $6 + 8 + 1 = 15$, write 5 carry 1. - Hundreds: $5 + 3 + 1 = 9$, write 9. - Thousands: $4 + 2 = 6$, write 6. 4. Final answer: $4567 + 2389 = 6956$. 1. Problem: Subtract 3725 from 5843 using column method. 2. Formula: Subtraction subtracts digits column-wise. 3. Step-by-step: - Units: $3 - 5$ not possible, borrow 1 from tens. - Tens: $4 - 2 - 1 (borrowed) = 1$. - Units after borrow: $13 - 5 = 8$. - Hundreds: $8 - 7 = 1$. - Thousands: $5 - 3 = 2$. 4. Final answer: $5843 - 3725 = 2118$. 1. Problem: Multiply 234 by 56 using column method. 2. Formula: Multiply each digit and add results. 3. Step-by-step: - Multiply 234 by 6: $6 \times 4 = 24$, write 4 carry 2. $6 \times 3 = 18 + 2 = 20$, write 0 carry 2. $6 \times 2 = 12 + 2 = 14$, write 14. - Multiply 234 by 5 (which is actually 50): $5 \times 4 = 20$, write 0 carry 2. $5 \times 3 = 15 + 2 = 17$, write 7 carry 1. $5 \times 2 = 10 + 1 = 11$, write 11. - Add partial products: $1404 + 11700 = 13104$. 4. Final answer: $234 \times 56 = 13104$.