Henry - Sumar y restar números racionales

<a rel="license" href="http://creativecommons.org/licenses/by-nc-sa/4.0/"><img alt="Licencia de Creative Commons" style="border-width:0" src="https://i.creativecommons.org/l/by-nc-sa/4.0/88x31.png" /></a><br /><span xmlns:dct="http://purl.org/dc/terms/" href="http://purl.org/dc/dcmitype/InteractiveResource" property="dct:title" rel="dct:type">Henry - Sumar y restar números racionales</span> by <span xmlns:cc="http://creativecommons.org/ns#" property="cc:attributionName">José Enrique Acosta Tenorio</span> is licensed under a <a rel="license" href="http://creativecommons.org/licenses/by-nc-sa/4.0/">Creative Commons Reconocimiento-NoComercial-CompartirIgual 4.0 Internacional License</a>.<br />Creado a partir de la obra en <a xmlns:dct="http://purl.org/dc/terms/" href="https://es.khanacademy.org/math/cc-seventh-grade-math/cc-7th-fractions-decimals/cc-7th-add-sub-rational-numbers/e/adding_and_subtracting_rational_numbers" rel="dct:source">https://es.khanacademy.org/math/cc-seventh-grade-math/cc-7th-fractions-decimals/cc-7th-add-sub-rational-numbers/e/adding_and_subtracting_rational_numbers</a>.