Question

Use the additive inverse to find -492.89 - (-871.78):

a) 378.89
b) 378.89
c) -378.89
d) -378.89

Answer 1

The calculation of -492.89 - (-871.78) results in 378.89, by adding the additive inverse of -871.78 (which is +871.78) to -492.89.

Step-by-step explanation:

To find -492.89 - (-871.78), you can use the concept of an additive inverse. The additive inverse of a number is what you add to that number to get zero. In this case, the additive inverse of -871.78 is +871.78.

So, the calculation becomes:

-492.89 + 871.78

Now let's add them:

871.78 (positive) is greater than 492.89 (negative), so the result will be positive. Subtracting the smaller absolute value from the larger gives us:

871.78 - 492.89 = 378.89

Therefore, the correct answer to the question -492.89 - (-871.78) is a) 378.89.