Adding

1
Adding Subtracting Mixed Numbers
2
Adding Mixed Numbers

• Its usually easier to do these problems if you
  write them vertically (up and down).

3
Adding Mixed Numbers

• Add the fractions, then add the whole numbers.

Remember make a common denominator if you need
to!
4
Improper Fraction

• Oops!
• What if we get an improper fraction?

5
Improper Fraction

• If we get an improper fraction - we fix it!

6
Subtracting Mixed Numbers

• Its usually easier to do these problems if you
  write them vertically (up and down).

7
Subtracting Mixed Numbers

• Subtract the fractions, then subtract the whole
  numbers.

Remember make a common denominator if you need
to!
8
Borrowing

• But, I cant take 5 away from 1.

9
Borrowing

• Youre going to have to change the top fraction
  by borrowing.
• Borrow 1 from the 5 and change the mixed number
  to an improper fraction.

10
Borrowing

• Now your top fraction is big enough!

11
Sneaky Trick

• See what happened when we borrowed.
• We added the 7 on the bottom of the fraction to
  the 1 on top to make the 8.
• Thats one shortcut that always works!

12
Remember
To add or subtract mixed numbers, write them
vertically.
The fractions need a L.C.D. Add or subtract the
fractions and then the whole numbers. If you get
an improper fraction, change it to a mixed number
and combine the whole numbers. If you need to
borrow from the whole number, add the bottom of
the fraction to the top to make the new top.