Răspuns :
1000 - 625 = 375 ( in prima )
375 + 125 = 500 ( in a doua )
625 - 500 = 125 ( in a treia ) sau 1000 - 375 - 500 = 125 ( in a treia )
375 + 500 + 125 = 1000 ( in total )
1000 - 625 = 375 ( in prima )
375 + 125 = 500 ( in a doua )
625 - 500 = 125 ( in a treia ) sau 1000 - 375 - 500 = 125 ( in a treia )
375 + 500 + 125 = 1000 ( in total )