What is the answer to 30-7?

To arrive at the solution for the expression 30 - 7, you start with the initial value of 30 and then subtract 7 from it. When you calculate this, you take away 7 from 30 which results in 23.

This operation is a basic subtraction, which involves finding the difference between the two numbers. Subtraction can often be visualized with a number line where you start at 30 and move 7 steps to the left, landing at 23.

Understanding subtraction is crucial, as it forms the basis for more complex mathematical concepts in various applications, including those encountered in the firefighter testing scenarios. Recognizing the correct process and maintaining accuracy in basic operations helps ensure you can tackle more advanced mathematical problems effectively.