Е) 0,4 + (- 3/11) + 7/55 = 4/10 - 3/11 + 7/55 = 44/110 - 30/110 + 14/110 = 28/110 = 14/55
ж) 5 11/42 + (- 7 13/28) + 5/21 = 5 11/42 - 7 13/28 + 5/21 = 5 22/84 - 7 39/84 + 20/84 = - 1 81/84 = - 1 27/28
з) 5/6 + 1 1/3 + ( - 1 23/30) = 5/6 + 1 1/3 - 1 23/30 = 25/30 + 1 10/30 - 1 23/30 = 12/30 = 2/5
и) 13,25 + (- 2 5/27) + (- 10 5/6) = 13 25/100 - 2 5/27 - 10 5/6 = 13 1/4 - 2 5/27 - 10 5/6 = 13 54/216 - 2 40/216 - 10 180/216 = 50/216 = 25/108