Question

AM NEVOIE URGENT!!! VA ROG!!! DAU COROANĂ !!! ​

Answer 1

Răspuns:

Explicație pas cu pas:

Answer 2

 

$\displaystyle\bf\\1.a)\\\\\left(\frac{1}{4}+1\frac{1}{4}\right)\cdot\frac{1}{6}=\left(\frac{1}{4}+\frac{1\times4+1}{4}\right)\cdot\frac{1}{6}=\left(\frac{1}{4}+\frac{5}{4}\right)\cdot\frac{1}{6}=\frac{6}{4}\cdot\frac{1}{6}=\boxed{\bf\frac{1}{4}}\\\\\\1.b)\\\\\left(\frac{7}{3}+\frac{2}{3}-\frac{1}{3}\right):\left(\frac{7}{9}-\frac{5}{9}\right) =\frac{7+2-1}{3}:\frac{7-5}{9}=\frac{8}{3}:\frac{2}{9}=\frac{8}{3}\cdot\frac{9}{2}=\boxed{\bf12}$

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$\displaystyle\bf\\2)\\\\1\frac{3}{5}+inversa~fractiei~\frac{5}{7}=\frac{1\times5+3}{5}+\frac{7}{5}=\frac{8}{5}+\frac{7}{5}=\frac{8+7}{5}=\frac{15}{5}=\boxed{\bf3}\\\\\\3)\\\\200:5=400\\10\%\times400=40~Lei~este~reducerea.\\\\\boxed{\bf2000-40=1960~Lei~pretul~dupa~reducere}$