Question

Calcule as adições e subtrações de frações a)1/6+2/7. B) 2/5 - 1/10 C) 5/3 +4/7 D) 5/4-2/8

Answer 1

Resposta:

A)   $\frac{1}{6} +\frac{2}{7} =\frac{7}{42} +\frac{12}{42} = \frac{19}{42}$

B)   $\frac{2}{5} -\frac{1}{10} = \frac{4}{10} - \frac{1}{10} = \frac{3}{10}$

C)   $\frac{5}{3} +\frac{4}{7} = \frac{35}{21} + \frac{12}{21} = \frac{37}{21}$

D)   $\frac{5}{4} -\frac{2}{8} = \frac{40}{32} -\frac{8}{32} = \frac{32}{32} = 1$