Question

Utilizando a propriedade distribuitiva,calcule:​

A) Resposta=
B) Resposta=
C) Resposta=

Answer 1

$\displaystyle \mathsf{a)\dfrac{2}{5}x(\dfrac{-1}{5}+\dfrac{1}{3})}\\\\\displaystyle \mathsf{\dfrac{-1x2}{5x5}+\dfrac{1x2}{5x3}=\dfrac{-2}{25}+\dfrac{2}{15}\to mmc}\\\\\\\displaystyle \mathsf{\dfrac{-6+10}{75}\to\dfrac{4}{75}}$

$\displaystyle \mathsf{b)4x(0,25+0,3-0,1)}\\\displaystyle \mathsf{1+1,2-0,4}\to 1,8$

$\displaystyle \mathsf{c)8x(\dfrac{3}{2}-\dfrac{1}{8}+\dfrac{5}{4})}\\\\\\\dfrac{24}{2}-\dfrac{8}8{}+\dfrac{40}{4}\to mmc}\\\\\\\displaystyle \mathsf{\dfrac{96-8+80}{8}=\dfrac{168}{8}\to21}$