There were a total of 7 tadpoles in a pond. One afternoon, Troy caught 6 tadpoles from the pond and took them home. How many tadpoles were left in the pond?

When Marshall went to bed, there were 584 birds on the lake. When he woke up in the morning, there were 687 birds on the lake. How many birds landed on the lake overnight?

You catch, tag, and release 50 fish back into a pond. Then, you catch 25 more fish, 5 of which are tagged. What is the best estimate of the number of fish in the pond?100 fish250 fish400 fish625 fish

A scientist counts 80 fishes in a pond. He marks them all with a UV pen. The next day he counts 60 fish, 24 of which have already been marked with his UV pen. Use this information to estimate the total fish in the pond:

Ryan and Kimberly are fishermen who, by coincidence, caught the same number of fish this week. Ryan caught fish in nets that hold 6 fish, while Kimberly caught fish in nets that hold 5 fish. What is the minimum number of fish each must have caught?

On a hot day, Natalie poured 7/8 of a bucket of water into a plastic wading pool. A few minutes later she added another 1/2 of a bucket. How much water did Natalie pour into the pool?