Remember that when adding positive and negative numbers,there are a couple of rules to follow. For example, in this case:
first, notice that since 8 is greater than 6, then the result will be a negative number.
Then, we substract 6 from 8 to get 2, so the final result would be:
Next, if we want to add two negative numbers, then we add the numbers and keep the negative sign, for example:
Notice that 2 plus 3 is 5, and since both 2 and 3 are negative,we have that:
If we want to substract a negative number from another negative number, like in thiscase:
just remember that anything that is inside of a parenthesis with a negative sign will change its sign, then, we have the following:
applying the same rules as before we have:
On the remaining cases, we have the following results:
