Final answer:
Subtract the number of dogs with pointy ears (394) from the total number of dogs (789) to find that there are 395 dogs with fluffy ears in the pet show.
Step-by-step explanation:
To find out how many of the 789 dogs entered into the pet show have fluffy ears, we need to subtract the number of dogs with pointy ears from the total number of dogs. There are 394 dogs with pointy ears. So, we perform the following calculation:
789 (total dogs) - 394 (pointy-eared dogs) = 395 (fluffy-eared dogs)
Therefore, there are 395 dogs with fluffy ears entered into the pet show.