Addition
and Subtraction

**Here, the weird thing is the denominator**

This is the case of the old and ever famous
common denominator syndrome.

1\2 + 1\4
= ?

you could use money and say 2 quarters make a half and one more quarter
makes 75¢ so a half a dollar plus a quarter of a dollar makes 3 quarters
of a dollar. You still created the common denominator when you made
two quarts instead of a fifty cent piece.

Looks like this:

__1__ __
1__
the denominators are

2
4
different.

we have to change the 1\2 (one half)

into 2\4 (two quarters) to match the one quarter. Now it looks like
this:

2
1
Now the denominators

4
4
are the same.