This is a simple math problem, which requires basic arithmetic knowledge. According to the question, there were 100 sheep in the sheepfold, but after the loss of 1, there were only 99 sheep left. Then eat another sheep, and there are only 98 sheep left. So there are 98 sheep left in the sheepfold.

The calculation process is as follows:

100 sheep-1 lost sheep = 99 sheep

99 sheep-1 eaten sheep = 98 sheep

So there are 98 sheep left in the sheepfold.

Generally speaking, this is a common math problem in primary schools, which tests children's basic computing ability and logical thinking ability. This kind of question is simple and easy to understand, but it is very practical.