Let's use a number line to show
my overdrawn bank balance.
If I start here at $-20 and
then I add -15 to that,
I can see that I move further away
from 0 all the way over to -35.
We can see that when we add
a negative number on the number line,
we move toward the left.
Which direction do we move when we add
a positive number on the number line?
Please select one.
