Question

Alguém me ajuda pfv,eu preciso de tudo isso pronto até às 14:00

Answer 1

a) $\frac{3}{5} + \frac{1}{2} - 1 = \frac{6}{10} + \frac{5}{10} - 1 = \frac{10}{10}$  

                         

b) $- \frac{2}{3} + \frac{5}{4} + \frac{1}{2} = - \frac{8}{12} + \frac{15}{12} + \frac{6}{12} = - \frac{1}{12}$

c) $- \frac{3}{7} + \frac{2}{5} =- \frac{15}{35} + \frac{14}{35} = \frac{1}{35}$

d) $- 2 - \frac{1}{2} + \frac{2}{3} =- 2 - \frac{3}{6} + \frac{4}{6} = \frac{9}{6}$

e) $- \frac{1}{2} - \frac{2}{5} + \frac{1}{5} = - \frac{5}{10} - \frac{2}{10} + \frac{2}{10} = \frac{9}{10}$

f)  $\frac{5}{7} - \frac{2}{3} + 1 = \frac{15}{21} - \frac{14}{21} + 1 = \frac{2}{21}$

g) $- \frac{2}{5} + \frac{1}{2} - \frac{1}{4} = - \frac{8}{20} + \frac{10}{20} - \frac{5}{20} =-\frac{7}{20}$

h) $- \frac{7}{8} + \frac{3}{4} +\frac{1}{2} = - \frac{7}{8} + \frac{6}{8} + \frac{4}{8} =-\frac{3}{8}$

i) $- 1 - \frac{3}{5} + \frac{1}{6} = - 1 - \frac{18}{30} + \frac{5}{30} = \frac{24}{30}$

j) $- 3 - \frac{4}{5} + \frac{1}{2} = - 3 - \frac{8}{10} + \frac{5}{10} = \frac{16}{10}$

espero ter ajudado!!!!

se puder colocar como melhor resposta agradeceria muito!!!!