Вычислите: А) 1/2 + 1/4 + 1/8

А) 1/2 + 1/4 + 1/8 = 4/8 + 2/8 + 1/8 = 7/8 Б) 1/2 + 1/3 + 1/6 = 3/6 + 2/6 + 1/6 = 6/6 = 1 В) 1/3 + 1/4 + 1/2 = 4/12 + 3/12 + 6/12 = 13/12 = 1 1/12 Г) 1/3 + 1/4 + 1/12 = 4/12 + 3/12 + 1/12 = 8/12 = 2/3 Д) 1/3 + 1/5 + 1/15 = 5/15 + 3/15 + 1/15 = 9/15 = 3/5 Е) 1/2 + 3/7 + 5/14 = 7/14 + 6/14 + 5/14 = 18/14 = 9/7 = 1 2/7 Ё) 1/4 + 3/5 + 5/7 = 35/140 + 84/140 + 100/140 = 219/140 = 1 79/140 Ж) 1/4 + 1/3 + 1/5 = 15/60 + 20/60 + 12/60 = 47/60 З) 2/3 + 1/2 + 3/7 = 28/42 + 21/42 + 18/42 = 67/42 = 1 25/42 И) 3/4 + 11/12 + 4/5 = 45/60 + 55/60 + 48/60 = 148/60 = 37/15 = 2 7/15 Й) 5/12 + 3/25 + 1/7 = 875/2100 + 252/2100 + 300/2100 = 1427/2100 К) 7/8 + 14/15 + 15/16 = 210/240 + 224/240 + 225/240 = 659/240 = 2 139/240 Л) 2/5 + 1/3 + 3/8 = 48/120 + 40/120 + 45/120 = 133/120 = 1 13/120 М) 2/3 + 1/4 + 7/12 = 8/12 + 3/12 + 7/12 = 18/12 = 3/2 = 1 1/2 Н) 4/5 + 3/4 + 9/20 = 16/20 + 15/20 + 9/20 = 40/20 = 2 О) 1/5 + 4/15 + 8/75 = 15/75 + 20/75 + 8/75 = 43/75 П) 1/8 + 3/20 + 7/40 = 5/40 + 6/40 + 7/40 = 18/40 = 9/20 Р) 5/96 + 3/16 + 7/24 = 5/96 + 18/96 + 28/96 = 51/96 = 17/32 С) 9/13 + 5/26 + 1/78 = 54/78 + 15/78 + 1/78 = 70/78 = 35/39 Т) 4/15 + 7/20 + 3/10 = 16/60 + 21/60 + 18/60 = 55/60 = 11/12