Question

Resolva as frações
A) 1/2+7/3×5/4
B) (0,7)×(+3,7-6,4)
C)(3/2 - 2/9)×3/4-1/2
D)[2/11-(3/2+2/5) ×5/6]

Answer 1

a)
$\frac{1}{2} + \frac{7}{3} \times \frac{5}{4}$
primeiro multiplicação

$\frac{7}{3} \times \frac{5}{4} = \\ \\ \frac{35}{12}$
agr a soma

$\frac{1}{2} + \frac{35}{12} =$
mmc de 2 e 12= 12

$\frac{1}{2} + \frac{35}{12} = \\ \frac{6 + 35}{12} = \\ \frac{41}{12}$
b)

$(0.7) \times ( + 3.7 - 6.4) \\ \frac{7}{10} \times (\frac{37}{10} - \frac{64}{10}) \\ \frac{7}{10} \times \frac{27}{10} \\ \frac{189}{100}$
c)
$(\frac{3}{2} - \frac{2}{9} ) \times \frac{3}{4 } - \frac{1}{2} \\ \frac{27 - 4}{18} \times \frac{3}{4 } - \frac{1}{2} \\ \frac{23}{18} \times \frac{3}{4 } - \frac{1}{2} \\ \frac{69}{72} - \frac{1}{2} \\ \frac{69 - 36}{72} \\ \frac{33}{72}$
d)
$\frac{2}{11} - ( \frac{3}{2} + \frac{2}{5}) \times \frac{5}{6} \\ \frac{2}{11} - \frac{15 + 4}{10} \times \frac{5}{6} \\ \frac{2}{11} - \frac{19}{10} \times \frac{5}{6} \\ \frac{2}{11} - \frac{95}{60} \\ \frac{24 - 209}{132} \\ \frac{ - 185}{132}$