Quick explanation:
Brief explanation: To subtract two numbers, we align them vertically by place value and subtract each column starting from the right, borrowing when necessary.
Step-by-step solution:
- Step 1: Subtract the ones column: 9 - 9 = 0.
- Step 2: Subtract the tens column: 1 - 5. Since 1 is less than 5, we borrow from the hundreds place. The 6 in the hundreds place becomes 5, and the 1 becomes 11. 11 - 5 = 6.
- Step 3: Subtract the hundreds column: 5 - 4 = 1.
Answer: 160