Choose the correct answer: What is $28+23$?

Step-by-step solution

1. Write the two numbers vertically.
2. Add the units: $8+3=11$, write 1 and carry 1 to the tens.
3. Add the tens: $2+2+1_{\text{carry}}=5$.
4. Result is $51$.

Concept tested: Addition of two‑digit numbers

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