Question

Соооооссс
Срооочноооо​

Answer 1

$1) - 12 + 5 = - 6 \\ 2) - 3.8 + 5.3 = 1.5 \\ 3)14.6 + ( - 6.4) = 14.6 - 6.4 = 8.2 \\ 4)8.19 + ( - 15.6) = 8.19 - 15 .6 = - 7.41 \\5) - 7.9 + 7.9 = 0 \\ 6) - 1 + 0.546 = - 0.454 \\ 7) - \frac{7}{12} + \frac{9}{10} = \frac{ - 35 + 54}{60} = \frac{29}{60 } \\ 8) 5\frac{2}{9} + ( - 2\frac{3}{4}) = 5 \frac{8}{36} - 2 \frac{27}{36} = 2 \frac{17}{36} \\ 9) - 5 \frac{3}{8} + 4 \frac{9}{10} = - 5 \frac{15}{40} + 4 \frac{36}{40} = - \frac{19}{40}$