Question

calcule o valor das espressões numéricas:

a) 2/5 + 5/6 - 3/2

b) 3/2 - 4/3 + 2/5

Answer 1

$> resolucao \\ \\ \geqslant fracoes \\ \\ a > \frac{2}{5} + \frac{5}{6} - \frac{3}{2} > > mmc = 30 \\ \\ a > \frac{12 + 25 - 45}{30} \\ \\ a > \frac{37 - 45}{30} \\ \\ a > \frac{ - 8}{30} \\ \\ a > - \frac{4}{15} \\ \\ = = = = = = = = = = = = = = = = = = = = = = \\ \\ \\ b > \frac{3}{2} - \frac{4}{3} + \frac{2}{5} > > mmc = 30 \\ \\ b > \frac{45 - 40 + 12}{30} \\ \\ b > \frac{5 + 12}{30} \\ \\ > \frac{17}{30} \\ \\ \\ > < > < > < > < > < > < >$