Question

O eleva din clasa a IV-a are de rezolvat in vacanta de iarna cateva probleme. In prima saptamana ea rezolva un sfert din numarul problemelor, in a doua saptamana 25 de probleme, iar in a treia saptamana cat in primele doua saptamani la un loc, terminandu-le de rezolvat pe toate. Cate probleme a avut ea de rezolvat?

Answer 1

1/4+25+1/4+25=4/4
2/4+50=4/4
4/4-2/4=50
2/4=50
1/4=25
4/4=25x4=100 probleme a avut

Answer 2

(1/4+25)×2=4/4
2/4+50=4/4
4/4-2/4=50
2/4=50.
1/4=25(50×2÷4)
4/4=25×4;. 4/4=100.
R:. Eleva a avut de rezolvat 100 de probleme.