Question

помогите пожалуйста с математикой, даю 20 баллов

Answer 1

$- 3 + 5 - ( - 11) = - 3 + 5 + 11 = 16 - 3 = 13$

$4.7 - 5.2 - 1.9 = 4.7 - 7.1 = - 2.4$

$- 2.9 - 4 - ( - 5.1) = - 2.9 - 4 + 5.1 = - 6.9 + 5.1 = - 1.8$

$- 14 - ( - 2) - ( - 3) = - 14 + 2 + 3 = - 14 + 5 = - 9$

$- 12 + 39 - 42 + ( - 2) = - 12 + 39 - 42 - 2 = - 56 + 39 = - 17$

$14 - ( - 2.5) + 3.7 - 4.2 = 14 + 2.5 + 3.7 - 4.2 = 20.2 - 4.2 = 16$