Decimal and Fraction Addition

1
Decimal and Fraction Addition

• Review Topic 4

2
Decimal Addition

• Whole numbers have the decimal after the one
  place
• Line up the decimal
• Fill in zeros
• Try 5 0.3 2.12 0.243

3
Common Denominator

• A number that can be divided evenly by both
  denominators is a common denominator
• The smallest common denominator is the least
  common denominator
• Find a common denominator
• for 7/15 and 5/12

4
Fraction Addition

• Find the least common denominator
• Raise all fractions to be added to that
  denominator
• ADD
• Simplify

5
Example

6

7
Example

• r and r2 are not like terms.
• Just add the first two terms.
• 24 is the LCD

8
Acceptable way to write

• These are the same.
• These are NOT the same because of the order of
  operations.