Question

..am nevoie.. sunt din București!​

Answer 1

$\it \bigg(2\dfrac{7}{23}-1\dfrac{45}{46}\bigg)\cdot\dfrac{23}{45}=\bigg(\dfrac{^{2)}53}{\ \ 23}-\dfrac{91}{46}\bigg)\cdot\dfrac{23}{45}=\dfrac{106-91}{46}\cdot\dfrac{23}{45}=\\ \\ \\ =\dfrac{\not15\ ^1}{\not46\ ^2}\cdot\dfrac{\not23\ ^1}{\not45\ ^3}=\dfrac{1}{6}$