Верны ли равенства? 1) 2/3: 4/5=10: 12 2) 3/7: 4/9=27: - вопрос №595834412345101223749272834115648 от makshardin17 20.02.2020 04:03

Question

Математика: Верны ли равенства? 1) 2/3: 4/5=10: 12 2) 3/7: 4/9=27: 28 3) 4/11: 5/6=48/110 4) 1/2: 2/3=4: 3

makshardin17 · Answer

1) да2/3 : 4/5 = 2/3 * 5/4 = 5/610/12 = 5/65/6 = 5/62) да3/7 : 4/9 = 3/7 * 9/4 = 27/2827/28 = 27/283) да4/11 : 5/6 = 4/11 * 6/5 = 24/5548/110 = 24/5524/55 = 24/554) нет1/2 : 2/3 = 1/2 * 3/2 = 3/43/4 не= 4/3...