а) 2,0928 + 47,9072: (7– 0,195) = 2,0928 + 47,9072 : 6,805 = 2,0928 + 7,04 = 9,1328
б) 100,5876 - 88,5856: (6,0811 + 8,4889) = 100,5876 - 88,5856 : 14,57 = 100,5876 - 6,079344... ≈ 94,508
в) 687,8 + (88,0802 - 85,3712): 0,045 = 687,8 + 2,709 : 0,045 = 687,8 + 60,2 = 748