eleos apla mathimatika einai :prepei na to skefteis polu alla ama vreis to klasma pou tairiazei (7/7) les :afou ht8ele na dwsei ta dipla ths mhteras sto gio ,kai sthn korh ta misa ths mhteras o dikhgoros ta xwris ws exei loipon 4/7 ston gio ,ta misa sth mana ,2/7 kai ta misa ths manas sthn korh 1/7 sry an se berdeyei h apanthsh ma an to skefteis tha deis pws einai swsto