What is the difference between 45 and 27?

Step-by-step solution

1. Subtract the units digits: $5-7$. Since 5 is less than 7, borrow 1 from the tens place.
2. Change the tens digit: $4-1=3$ (after borrowing).
3. Now subtract the units: $15-7=8$.
4. Subtract the tens: $3-2=1$.
5. Combine the results: $10+8=18$.
6. Thus, the difference is $18$.
7. Mark the final answer as $18$.
8. Note that the correct answer is 18.

Concept tested: Subtraction with borrowing

Published 1 October 2026 · How this solution was prepared and checked