Why is the sum of two negative numbers always negative?

Answer 1

Because by 'adding' a negative number to another negative number, you are making the first number even smaller - or more negative

A negative number means to take away. Think about in terms of money. If I owe you five dollars, then I have negative five dollars (-5). If I borrow ten more, then I owe you additional (+) ten dollars (-10). You would then add them together to figure out how much is owed. Five dollars plus ten dollars is fifteen dollars (-5 + -10 = -15).

Or you can think about it this way: two negative numbers added are always negative for the same reasons as when you add positive numbers, their sum is always positive. You get further away from zero, just in opposite directions.</P>

Answer 2

10