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Patru cutii de acelasi fel contin 24 de prajituri.Cate prajituri contin 5 cutii de aceeasi marime?Dar 7 cutii?

Răspuns :

4c=24p
1c=24:4, 1c=6
5c=6*5=30p
7c=6*7=42c


x=nr prajituri dintr-o cutie

4x=24

x=24/4

x=6

In 5 cutii incap 6*5=30 prajituri

In 7 cutii incap 6*7=49 prajituri