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 4406 views around the world You can reuse this answer Creative Commons License