1) 3 1/3*(2 3/4 : 5 1/2) 2) (1 3/5+2 1/5): 1 9/10+(1 - вопрос №751681413132345122135215191017104527 от Mawamawa00 16.07.2020 09:22

Question

Математика: 1) 3 1/3*(2 3/4 : 5 1/2) 2) (1 3/5+2 1/5): 1 9/10+(1 7/10-4/5): 2/7

Mawamawa00 · Answer

1.    3 1/3 * (2 3/4 : 5 1/2) = 2 13/211) 2 3/4 : 5 1/2 = 11/4 : 7/2 = 11/4 * 2/7 = 11/14,2) 3 1/3 * 11/14 = 10/3 * 11/14 = 55/21 = 2 13/21,2.    (1 3/5 + 2 1/5) : 1 9/10 + (1 7/10 - 4/5) : 2/7 = 5 3/20,1) 1 3/5 + 2 1/5 = 3 4/5,2) 3 4/5 : 1 9/10 = 19/5 : 19/10 = 19/5 * 10/19 = 2,3) 1 7/10 - 4/5 = 17/10 - 8/10 = 9/10,4) 9/10 : 2/7 = 9/10 * 7/2 = 63/20 = 3 3/20,5) 2 + 3 3/20 = 5 3/20...