Toán 6!!!^^

H

hocvuima

$\dfrac{-3}{7}.\dfrac{-10}{4}-1\dfrac{1}{9}.0,75+\dfrac{4}{7}:\mid \dfrac{-4}{3} \mid $
$=\dfrac{3}{7}.\dfrac{10}{4}-\dfrac{10}{9}.\dfrac{3}{4}+\dfrac{4}{7}:\dfrac{4}{3}$
$=\dfrac{3}{7}.\dfrac{5}{2}-\dfrac{5}{2}.\dfrac{1}{3}+\dfrac{3}{7}$
$=\dfrac{3}{7}.\dfrac{7}{2}-\dfrac{5}{6}$
$=\dfrac{3}{2}-\dfrac{5}{6}$
$=\dfrac{2}{3}$
 
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