Выполните действия 2)3-(1/2+1/7) 4)2-(11/19+15/38) - вопрос №3366917231217421119153867194013 от nicedaria 19.06.2020 18:36

Question

Математика: Выполните действия 2)3-(1/2+1/7) 4)2-(11/19+15/38) 6)7-(19/40+1/3)

nicedaria · Answer

3 - (1/2 + 1/7) = 2 5/141) 1/2 + 1/7 = 7/14 + 2/14 = 9/142) 3 - 9/14 = 2 14/14 - 9/14 = 2 5/142 - (11/19 + 15/38) = 1 1/381) 11/19 + 15/38 = 22/38 + 15/38 = 37/382) 2 - 37/38 = 1 38/38 - 37/38 = 1 1/387 - (19/40 + 1/3) = 6 23/1201) 19/40 + 1/3 = 57/120 + 40/120 = 97/1202) 7 - 97/120 = 6 120/120 - 97/120 = 6 23/120...