а) -4.2 - 8.3 = -12.5б) -3.8 - 3.5 = -7.3в) -8.6 + 3.7 = -4.9г) 4.5 - 9.1 = -4.6д) -5/6 + 3/8 = -20/24 + 9/24 = -11/24е) -2.5/7 - 1.3/14 = -0.3571 - 0.0929 = -0.452) (6/35 - 4/7) - (-1.8 - 4.3) - 5.7= (6/35 - 4/7) - (-6.1) - 5.7= (6/35 - 20/35) + 6.1 - 5.7= -14/35 + 0.4= -0.4 - 5.7= -6.1
Ответ: -6.1
а) -4.2 - 8.3 = -12.5
б) -3.8 - 3.5 = -7.3
в) -8.6 + 3.7 = -4.9
г) 4.5 - 9.1 = -4.6
д) -5/6 + 3/8 = -20/24 + 9/24 = -11/24
е) -2.5/7 - 1.3/14 = -0.3571 - 0.0929 = -0.45
2) (6/35 - 4/7) - (-1.8 - 4.3) - 5.7
= (6/35 - 4/7) - (-6.1) - 5.7
= (6/35 - 20/35) + 6.1 - 5.7
= -14/35 + 0.4
= -0.4 - 5.7
= -6.1
Ответ: -6.1