Question

a) 1/2+ 5/6 ÷4/3 − 1/5 =

b) 9/21 x 7/9 ÷ 1/3=

c) 4/5 + 7/6 x 0,8 x 35/24=

Answer 1

Respuesta:

$a) \frac{1}{2} + \frac{5}{6} \div \frac{4}{3} - \frac{1}{5} = \\ \frac{1}{2} + \frac{5}{6} \times \frac{3}{4} - \frac{1}{5} = \\ \frac{1}{2} + \frac{5}{8} - \frac{1}{5} = \\ \frac{20}{40} + \frac{25}{40} - \frac{8}{40} = \\ \frac{37}{40}$

$b) \frac{9}{ 21} \times \frac{7}{9} \div \frac{1}{3} = \\ \frac{3}{7} \times \frac{7}{9} \times 3 = \\ 1$

$c) \frac{4}{5} + \frac{7}{6} \times 0.8 \times \frac{35}{24 } = \\ \frac{4}{5} + \frac{7}{6} \times \frac{8}{10} \times \frac{35}{ 24} = \\ \frac{4}{5} + \frac{7}{6} \times \frac{4}{5} \times \frac{35}{24} = \\ \frac{4}{5} + \frac{49}{36} = \\ \frac{144}{180} + \frac{245}{180} = \\ \frac{389}{180}$