Frank has an apple tree in his backyard. 5 apples are hanging on the tree and 8 have fallen to the ground. If Frank's dog eats 3 of the apples off of the ground, how many apples are left?
Please answer the following question by reasoning step-by-step.
10
Frank originally had 5 + 8 = 13 apples.

After his dog eats 3, there are 13 - 3 = 10 apples.

.

So, the answer is 10