Вопрос школьника по предмету Математика
помогите пожалуйста решить (7/15+4/5):3-1/9
Ответ учителя по предмету Математика
вроде так: сначала все дроби приводим к одному знаменателю. (7/15*3+4/5*9):3-1/9*5=(21/45+36/45)/3-5/45=57/45:3-5/45=19/45-5/45=14/45
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