September 10, 2013
Khan Academy Originaltitel: Subtraction Word Problem – https://www.khanacademy.org/math/arithmetic/addition-subtraction/add_sub_word_problems/v/subtraction-word-problem Übungen: https://www.khanacademy.org/math/arithmetic/addition-subtraction/add_sub_word_problems/e/arithmetic_word_problems_1 Dieses Video