Question

Соооооссс
Срооочноооо​

Answer 1

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