8 cutii napolitane + 7 cutii bomboane = 51 Ron
8 cutii napolitane + 3 cutii bomboane =31 Ron
Rezolvare:
1.Cat costa 4 cutii cu bomboane?
51 RON -31 RON =20 Ron
2.Cat costa o cutie cu bomboane?
20 Ron÷4=5 RON
3.Cat costa 3 cutii cu bomboane?
5 Ron × 3 = 15 RON
4.Cat costa 8 cutii cu napolitane?
31 Ron - 15 Ron =16 Ron
5.Cat costa o cutie cu napolitane?
16 Ron ÷ 8=2 Ron
R:1 cutie cu bomboane 5 Ron
1 cutie cu napolitane 2 Ron