**
SUBTRACTION**

**If your total wealth is $4 and then
you go into debt for $11 what is your total wealth? Obviously you are now in
debt for $7 which
can be written -$7. So what has happened is you have added a negative $11
to your wealth of $4 and this can be calculated as **

** $4 + (-$11) = -$7 it could
also be done -$11 + $4 = -$7**

**In algebra we don't deal with subtraction
problems instead we change all subtraction problems to addition problems and
then use the rules of addition to solve the problems. Lets look at a
problem and see if you can write the rules for subtraction.**

**8 - (-3) = 11 try to figure out what
we did. answer
**

**Try these problems. 1) 18 - (-7)
= 2) 15 - (-3) =
3) 9 - (+7) = 4) -8 - (+ 3) = answer **