13+310\dfrac{1}{3} + \dfrac{3}{10}
13+310\dfrac{1}{3} + \dfrac{3}{10}
Since these fractions have different denominators, we need to find the least common multiple of the denominators
The least common multiple of 3 and 10 is 30, so we need to multiply to make each of the denominators = 30
13∗1010=1030\dfrac{1}{3} * \dfrac{10}{10} = \dfrac{10}{30}
310∗33=930\dfrac{3}{10} * \dfrac{3}{3} = \dfrac{9}{30}
Since these fractions have the same denominator, we can just add the numerators
1030+930=1930\dfrac{10}{30} + \dfrac{9}{30} = \dfrac{19}{30}