Add –81 + (–13).
is it:
-81+ 13= -68?
No.
Think of adding and subtracting negative numbers this way.
You owe $81 (which is -81) on your charge card.
Then you add another charge of 13 (-13).
Now you owe -81 + (-13) = -94
is it:
-81+ 13= -68?
Think of adding and subtracting negative numbers this way.
You owe $81 (which is -81) on your charge card.
Then you add another charge of 13 (-13).
Now you owe -81 + (-13) = -94