Question

2/5 x 3/4 - 1/5 x 1/8 - 1/40

Answer 1

$\frac{2}{5} \times \frac{3}{4} - \frac{1}{5} \times \frac{1}{8} - \frac{1}{40} \\ \\ \frac{1}{5} \times \frac{3}{2} - \frac{1}{40} - \frac{1}{40} \\ \\ \frac{3}{10} - \frac{1}{40} - \frac{1}{40} \\ \\ \frac{12 - 1 - 1}{40} \\ \\ \frac{10}{40} \\ \\ \frac{1}{4}$

Espero averte ayudado

Salu2

Answer 2

Respuesta:

$\frac{99}{4000}$

Explicación paso a paso:

Organizamos con paréntesis:

$\frac{2}{5}.(\frac{3}{4}-\frac{1}{5}) .(\frac{1}{8}- \frac{1}{40} ) =\\\\\frac{1}{8}-\frac{1}{40} =\frac{40-8}{320} =-\frac{36}{320} =-\frac{9}{80} =\\\\\frac{2}{5}.(\frac{3}{4}-\frac{1}{5}) .\frac{9}{80} =  \frac{3}{4}-\frac{1}{5} = \frac{15-4}{20}=-\frac{11}{20}\\\\(\frac{2}{5}.\frac{11}{20} ) .\frac{9}{80} = \frac{2}{5}.\frac{11}{20} =\frac{2 x 11}{5x10} = \frac{22}{100} = \frac{11}{50} =\\\\\frac{11}{50} .\frac{9}{80} =\frac{11x9}{50x80} = \frac{99}{4000}$