4-5 Add or Subtract Mixed Numbers

Add Mixed Numbers

• To add mixed numbers:o First add the fractions

oYou may need to rename the fractions so that they have the same denominators

o Then, add the whole numbers

• Example:

• 15 2/3 + 7 1/2 =

•

15 2/3

+7 1/2

=

=

Try these:A. -5 1/3 + (-1/4) B. 7 9/10 + (-5 1/2)

Subtract Mixed Numbers

• To subtract mixed numbers:o Change mixed numbers into improper fractionsoYou may need to rename the fractions so that they have the

same denominatorso Subtract the fractions

• Example:

• 15 2/3 - 8 2/6 =

=

=

Try these:A. -5 1/3 - (2 1/4) B. 7 9/10 - (-5 1/2)

Add or Subtract Mixed numbersUse Your Calculator

• To add or subtract Mixed Numbers using your calculator:o Example: 5 2/3 + 7 1/2o 5<abc>2<abc>3<+>7<abc>1<abc>2< = >o this will give you a fraction in simplest form

• You try these:o 4¼ - 2 4/9 = ________o 10 2/3 + ( - 4 1/2) = ________o -13 1/3 - ( 2 3/7) = ________