Khan Academy Static

Learn how to study algebraic expressions containing variables whose values are unknown, and how to derive new facts about those expression by using other information. For example, given two positive integers b and c where b>c, determine which expression is greater: b/(b+c) or 0.5.

1915_Reasoning_about_unknown_variables_divisibility.html

1916_Structure_in_rational_expression.html

1917_Structure_in_exponential_expression.html

1912_Analyzing_structure_word_problem_pet_store_1_of_2_.html

1913_Analyzing_structure_word_problem_pet_store_2_of_2_.html

1914_Reasoning_about_unknown_variables.html