Q: After reciting soorah Faatihah in each rakaat is it permissible to recite only part of one long soorah instead of a whole one so that a few long soorahs are completed during the whole prayer instead of many short soorahs?

A: Yes, it is permissible to recite part of a long soorah in prayer, instead of reciting a complete short soorah, But it is better to recite a complete soorah in each rak’ah. This is what the Prophet (peace and blessings of Allaah be upon him) usually did. Al-Bukhaari (762) and Muslim (451) narrated that Abu Qutaadah said: “The Prophet (peace and blessings of Allaah be upon him) used to recite al-Faatihah and another soorah in the first two rak’ahs of Zuhr and ‘Asr.” This hadeeth indicates that “reciting a short soorah in full is better than reciting an equal part of a longer soorah.” (Sharh Muslim by al-Nawawi (4/174). The words of Abu Qutaadah - “The Prophet (peace and blessings of Allaah be upon him) used to recite…” indicate that the Prophet (peace and blessings of Allaah be upon him) persisted in doing that, or that this is what he usually did. Fath al-Baari, 2/244.
-Shaykh Ibn ‘Uthaymeen (may Allaah have mercy on him) said: “There is nothing wrong with a man reciting one verse from a soorah in an obligatory prayer or in a naafil prayer. This may be understood from the aayah (interpretation of the meaning):
 ‘So, recite you of the Qur’aan as much as may be easy for you’
But the Sunnah – which is preferable – is to recite a soorah, and the best is to recite one soorah in each rak’ah. If that is too difficult then it is acceptable to divide the soorah between the two rak’ahs.” (al-Sharh al-Mumti’, 3/104).
May Allaah help us all to acquire useful knowledge and to do righteous deeds.