What is 1/3 +1/9 + 1/3 equal in simplest form? Algebra Properties of Real Numbers Addition of Rational Numbers 1 Answer smendyka May 21, 2018 #1/3 + 1/9 + 1/3 =># #(3/3 xx 1/3) + 1/9 + (3/3 xx 1/3) =># #3/9 + 1/9 + 3/9 =># #(3 + 1 + 3)/9 =># #7/9# Answer link Related questions How do you add rational numbers? How do you write fractions with a common denominator? How do you write mixed fractions into improper fractions? How do you write #11 2/3# into an improper fraction? How do you add #4 1/7 + 2/7#? How do you add #3/5+2/8#? How do you change fractions into decimals? How do you find the sum of #2.5+2.57+3.1#? How do you calculate #18/12 - 7/9#? How do you write 5 into an improper fraction? See all questions in Addition of Rational Numbers Impact of this question 4086 views around the world You can reuse this answer Creative Commons License