الصيغة 1احسب :
\( \left(\dfrac{9}{10}-\dfrac{48}{670}\right)+\left(\dfrac{7}{8}+\dfrac{48}{670}\right) \)
✅ التصحيح
بتطبيق: (a-c)+(b+c) = a+b [c يختصر]
\( \left(\dfrac{9}{10}-\dfrac{48}{670}\right)+\left(\dfrac{7}{8}+\dfrac{48}{670}\right) = \dfrac{9}{10}+\dfrac{7}{8} = \dfrac{71}{40} \)