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    • https://espanol.libretexts.org/Matematicas/Pre-Algebra/Libro%3A_Prealgebra_(Arnold)/04%3A_Fracciones/4.07%3A_Sumando_y_restando_fracciones_mixtas
      \[ \begin{aligned} 3 \frac{1}{4} + 2 \frac{1}{3} = \left( 3 + \frac{1}{4} \right) + \left( 2 + \frac{1}{3} \right) ~ & \textcolor{red}{ \text{ Mixed fractions as sums.}} \\ = (3+2) + \left( \frac{1}{4...\[ \begin{aligned} 3 \frac{1}{4} + 2 \frac{1}{3} = \left( 3 + \frac{1}{4} \right) + \left( 2 + \frac{1}{3} \right) ~ & \textcolor{red}{ \text{ Mixed fractions as sums.}} \\ = (3+2) + \left( \frac{1}{4} + \frac{1}{3} \right) ~ & \textcolor{red}{ \text{ Reorder and regroup.}} \\ = 5 + \left( \frac{1 \cdot \textcolor{red}{3}}{4 \cdot \textcolor{red}{3}} + \frac{1 \cdot \textcolor{red}{4}}{3 \cdot \textcolor{red}{4}} \right) ~ & \textcolor{red}{ \begin{aligned} \text{ Add whole numbers: 3 + 2 = 5.}…

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