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Doua vaci consuma intr-o zi 15 kg de fan.Cate kg de fan vor consuma 5 vaci?Dar 9?Dar 11?

Răspuns :

Cat consuma o vaca?
15:2=7,5kg
Cat vor consuma 5 vaci?
5×7,5=37,5kg
Cat vor consuma 9 vaci?
9×7,5=67,5kg
Cat vor consuma 11 vaci?
11×7,5=82,5kg