Question

1-2/9
5/9+2/5
13/25x(1/4+3/25)
x+14/15=2/3+3/10
11x2 13/54-12,4​

Answer 1

Ответ:

$1 - \frac{2}{9} = \frac{9 - 2}{9} = \frac{7}{9} = 0.7$

$\frac{5}{9} + \frac{2}{5} = \frac{25 - 18}{45} = \frac{7}{45} = 0.15$

$\frac{13}{25} \times ( \frac{1}{4} + \frac{3}{25}) = \frac{13}{25} \times \frac{37}{100} = \frac{481}{2500} = 0.1924$

$x + \frac{14}{15} = \frac{2}{3} + \frac{3}{10} \\ x + \frac{14}{15} = \frac{29}{30} \\ x = \frac{29}{30} - \frac{14}{15} = \frac{1}{30} = 0.03$

$11 \times 2 \frac{13}{54} - 12.4 = \\ 11 \times \frac{13}{27} - \frac{62}{5} = \frac{143}{27} - \frac{62}{5} = \\ = - \frac{959}{135}$