A dog has 4 legs. How many legs do 2 dogs have?

A cat caught 3 mice. If it eats 1 mouse a day, how many days will the mice last?

A bird laid 5 eggs. 2 eggs hatched. How many eggs are left?

If a rabbit eats 2 carrots a day, how many carrots does it eat in 3 days?

There are 7 fish in a pond. 3 swim away. How many fish are left?