А) 4 1/30-3 1/20 б)14 1/12-1 1/18 в)3 9/25-1 7/10 - вопрос №41303120141121118392517101312411118131181011212675675 от solomeina2017 15.08.2022 20:39

Question

Математика: А) 4 1/30-3 1/20 б)14 1/12-1 1/18 в)3 9/25-1 7/10 г)13 1/24-1 11/18 д)13 1/18-10 1/12 е)16 2/25-12 2/15

solomeina2017 · Answer

а) 4 1/30-3 1/20 = = 4 2/60 - 3 3/60) = 62/60 - 3/60 = 59/60

б)14 1/12-1 1/18 = 14 3/36 - 1 2/36 = 13 1/36

в)3 9/25-1 7/10 = 3 18/50 - 1 35/50 = 1 + ( 68/50 - 35/50) = 1 33/50

г)13 1/24-1 11/18 = 12 + (3/72 - 44/72) = 11 + (75/72 - 44/72) = 11 31/72

д)13 1/18-10 1/12 = 13 2/36 - 10 3/36 = 2 35/36

е)16 2/25-12 2/15 = 16 6/75 - 12 10/75 = 3 71/75