Question

Ayúdeme por favor dísculpe urgentes por favor ​

Answer 1

a)

$\frac{7 - \frac{7}{4} + \frac{8}{5} }{3 + \frac{3}{4} } = \frac{ \frac{140 - 35 + 32}{20} }{ \frac{15}{4} } = \frac{ \frac{137}{20} }{ \frac{15}{4} } = \frac{137}{20} \div \frac{15}{4} = \frac{<strong>1</strong><strong>3</strong><strong>7</strong>}{<strong>75</strong>}$

b)

$\frac{( \frac{1}{3} - 9) \times \frac{1}{5} }{ \frac{3}{4} - \frac{7}{2} } = \frac{ - \frac{26}{3} \times \frac{1}{5} }{ \frac{3 - 14}{4} } = \frac{ - \frac{26}{15} }{ - \frac{11}{4} } = - \frac{26}{15} \div - \frac{11}{4} = \frac{<strong>104</strong>}{<strong>165</strong>}$

c)

$0.7 + {\frac{2}{3} - (0.25 - (1.6 - \frac{9}{10} )) + 7} \\ \\ 0.7 = \frac{7}{10} \\ 0.25 = \frac{1}{4} \\ 1.6 = \frac{8}{5}$

7/10 + {2/3 - [ 1/4 - (8/5 - 9/10)] + 7} =

7/10 + {2/3 - [1/4 - 7/10] + 7} =

7/10 + {2/3 - [ - 9/20] + 7} =

7/10 + {2/3 + 9/20 + 7} =

7/10 + { 487/60} =

7/10 + 487/60 = 529/60

espero haberte ayudado