National Testing Network (NTN) Firefighter Testing System (FireTEAM) Math Practice Test

To find the result of subtracting 18 from 30, you start with 30 and take away 18.

When you break it down:

1. Take 30.

2. To simplify the subtraction, you can think of 30 as 30 - 10 - 8.

3. Subtracting 10 from 30 gives you 20.

4. Then, subtracting 8 from 20 results in 12.

This shows that the final result of 30 minus 18 is 12, confirming that the correct answer is indeed accurate. Subtraction can sometimes be visualized using a number line or regrouping, helping to clarify that by moving back 18 units from 30 lands you at 12.