Question

Решите пж срочно!!!!!

Answer 1

$1) \: - 14 + 8 = 8 - 14 = - 6 \\ 2) \: - 2.7 + 6.4 = 6.4 - 2.7 = 3.7 \\ 3) \: 16.8 + ( - 9.5) = 16.8 - 9.5 = 7.3 \\ 4) \: 7.23 + ( - 18.4) = 7.23 - 18.4 = - 11.17 \\ 5) \: - 9.4 + 9.4 = 9.4 - 9.4 = 0 \\ 6) \: - 1 + 0.837 = 0.837 - 1 = - 0.163 \\ 7) \: - \frac{ 5}{6} + \frac{7}{8} = \frac{7}{8} - \frac{5}{6} = \frac{42}{48} - \frac{40}{48} = \frac{42}{48} = 0.875 \\ 8) \: 3 \frac{7}{8} + ( - 2 \frac{1}{9} ) = \frac{31}{8} - \frac{19}{9} = \frac{279}{72} - \frac{152}{72} = \frac{127}{ 72} = 1 \frac{55}{72} \\ 9) \: - 6 \frac{2}{9} + 2 \frac{5}{6} = 2 \frac{5}{6} - 6 \frac{2}{9} = \frac{17}{6} - \frac{56}{9} = \frac{153}{54} - \frac{336}{54} = - \frac{183}{54} = 3 \frac{21}{54}$