Pre-Algebra on Khan Academy: No way, this isn’t your run of the mill arithmetic. This is Pre-algebra. You’re about to play with the professionals. Think of pre-algebra as a runway. You’re the airplane and algebra is your sunny vacation destination. Without the runway you’re not going anywhere. Seriously, the foundation for all higher mathematics is laid with many of the concepts that we will introduce to you here: negative numbers, absolute value, factors, multiples, decimals, and fractions to name a few. So buckle up and move your seat into the upright position. We’re about to take off!

About Khan Academy: Khan Academy offers practice exercises, instructional videos, and a personalized learning dashboard that empower learners to study at their own pace in and outside of the classroom. We tackle math, science, computer programming, history, art history, economics, and more. Our math missions guide learners from kindergarten to calculus using state-of-the-art, adaptive technology that identifies strengths and learning gaps. We’ve also partnered with institutions like NASA, The Museum of Modern Art, The California Academy of Sciences, and MIT to offer specialized content.

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Prepárate Mejor: Cursos de preparación para GMAT impartidos por egresados de Harvard. Online en vivo o en video. https://matematicaprep.com/ En este video haremos ejercicios sobre algunos conceptos clave con los que te podrías encontrar en los problemas de palabras del GMAT y que complementan los conceptos clave principales que vemos en el curso de Matematica…

In this video I go over the derivation of a very useful formulation that describes catenaries in general and includes parameters such as the length of the cable, the vertical and horizontal distances, and the physical properties of the material being used. Although I derive this formulation with “asymmetric” catenaries in mind, it is applicable…

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