Question

Me ajudem!!!! Preciso do cálculo também

Answer 1

Explicação passo-a-passo:

$a) \: - \frac{7}{8} + 4.5 = - \frac{7}{8} + \frac{45}{10} = - \frac{7}{8} + \frac{9}{2} = \frac{ - 7 + (4 \times 9)}{8} = \frac{ - 7 + 36}{8} = \frac{29}{8} \\ \\ b) \: \frac{3}{2} - ( - \frac{1}{2} ) = \frac{3}{2} + \frac{1}{2} = \frac{4}{2} = 2 \\ \\ c) \: \frac{13}{5} + \frac{10}{10} = \frac{13}{5} + 1 = \frac{13 + (5 \times 1)}{5} = \frac{13 + 5}{5} = \frac{18}{5} \\ \\ d) \: - \frac{2}{3} + 2.5 = - \frac{2}{3} + \frac{25}{10} = - \frac{2}{3} + \frac{5}{2} = \frac{ - (2 \times 2) + (3 \times 5)}{3 \times 2} = \frac{ - 4 + 15}{6} = \frac{11}{6}$