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Arithmetic - Chapter 4. Simplification with grouping signs (playlist): • Arithmetic │ 5. Hierarchy of operations... SUBSCRIBE: http://bit.ly/VN7586 (DON'T FORGET TO GIVE A ¨LIKE¨) VISIT: http://math2me.com FB: http://bit.ly/FBmath2me G+: http://google.com/+math2me Twitter: http://bit.ly/14ql1b7 (Video explained by José Andalón) Help us caption & translate this video! http://amara.org/v/En76/