Найдите значение выражения. -5/8+1/4+7/12. 1/5+(-1/7 )+2/9. -1/8+3/9+-(5/36). 7/8 +(-4/5)+(-1 цел.1/20). -11/18+5/12+7

1) -5/8 + 1/4 + 7/12 = (-5+2)/8 + 7/12 = -3/8 + 7/12 = (-9+14)/24 = 5/242) 1/5 + (-1/7) + 2/9 = (7-5)/35 +2/9 = 2/35 +2/9 = (18 + 70)/315 = 88/3153) -1/8 +3/9 + (-5/36) = (-9 + 24)/72 - 5/36 = 15/72 - 10/72 = 5/724) 7/8 + (-4/5) + (-1 1/20) = (35-32)/40 - 21/20 = 3/40 - 42/40 = -39/405) -11/18 + 5/12 + 7 1/9 = (-22+15)/36 + 64/9 = -7/36 + 256/36 = 249/36 = 6 33/366) 2 4/15 +2/5 + (-5 1/6) = 2 + (4+6)/15 - 5 1/6 = 2 2/3 - 5 1/6 = 8/3 - 31/6 = (16-31)/6 = -15/6 = 2 3/6 = 2 1/2