الصيغة 1احسب :
\( \left(\dfrac{8}{10}+\dfrac{17}{891}\right)-\left(\dfrac{5}{8}+\dfrac{17}{891}\right) \)
✅ التصحيح
بتطبيق: (a+c)−(b+c) = a−b [c يختصر]
\( \left(\dfrac{8}{10}+\dfrac{17}{891}\right)-\left(\dfrac{5}{8}+\dfrac{17}{891}\right) = \dfrac{8}{10}-\dfrac{5}{8} = \dfrac{7}{40} \)