Problem. Grandmother's Court.
Grandma has 9 ducks, 10 chickens, 12 geese, 11 sheep and 7 cats in the yard. How many feet do the animals have in total?
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Exemple !
The grandmother has 10 ducks, 7 chickens, 5 geese, 4 sheep and 2 cats in the yard. How many feet do the animals have in total?
We know that ducks, chickens and geese have 2 legs and sheep and cats have 4 feet.
We multiply the number of animals by the number of feet.
10 × 2 + 7 × 2 + 2 × 4 =
20 + 14 + 8 = 42