Question

Un elev a rezolvat intr-o saptamana 1/3din problemele date suplimentar si inca sase ,a doua saptamana 1/4 din rest si inca 9 probleme, atreia saptamana 4/6 din rest si ultimile 30 probleme. Cate probleme a avut de rezolvat si cate a rezolvat in fiecare din cele trei saptamani?

Answer 1

4/6+30=6/6
1/6=30:2=15
6/6=15x6=90probleme in a treia saptamana
4/4=90:3x4=120
1/4+9=30+9=39 probleme in a doua saptamana
3/3=120:4x3=90
1/3=90:3
30+6=36 in prima saptamana
36+39+90=165 a avut