Răspuns :
5-1= 4 l apa
o jumatate litru = 500 ml
500ml + 500ml + 500ml+ 500ml+500ml+500ml+500ml +500ml= 4l apa
deci are nevoie de 8 sticle.
o jumatate litru = 500 ml
500ml + 500ml + 500ml+ 500ml+500ml+500ml+500ml +500ml= 4l apa
deci are nevoie de 8 sticle.