Final answer:
The additive inverse property is used to subtract rational numbers by changing the sign of the number being subtracted and then adding it to the other number.
Step-by-step explanation:
The additive inverse property is used to subtract rational numbers by changing the sign of the number being subtracted and then adding it to the other number. This can be understood using the example of subtracting fractions. For example, to subtract 1/2 from 3/4, we can change the sign of 1/2 to -1/2 and add it to 3/4. This is because adding a negative is the same as subtracting a positive.