A child has 42 candies and gives 19 candies to a friend. How many candies does the child have left?

Step-by-step solution

1. Set up the subtraction: $42-19$.
2. Subtract units: $2-9$ is not possible, so borrow 1 ten from the tens digit.
3. After borrowing, units become $12$ and tens become $3$. Now $12-9=3$.
4. Subtract tens: $3-1=2$.
5. Combine to get $23$ candies left.

Concept tested: Subtraction of two–digit numbers

Published 13 October 2026 · How this solution was prepared and checked