ekabbar tech#ekabbar# akabbar tech#science and technology#science and tech# science and technology video# science and technology channel# [email protected]#microsoft word# microsoft powerpoint,microsoft excel#microworkers, microsoft 365# microsoft powerpoint# microsoft power point full corse# ict# hsc ict#ict class 1112# ict hsc chapter 3 part 2# ict hsc chapter2, ict hsc chapter 3# microsoft word tutorial# microsoft excel tutorial# microsoft powerpoint tutorial#সংখ্যারে পূর্বের ও পরের মান নির্ণয়