Xiao Ming borrowed 500 from his parents and bought a pair of shoes 970. There was 30 left. He gave 10 yuan to his father, 10 yuan to his mother, and 10 yuan to himself. Finally, he had to return 49 yuan to his parents. He asked: father 49 yuan, mother 49 yuan, and he had 10 yuan, a total of 99 yuan. What about 10 yuan?

Xiao Ming borrowed 500 from his parents and bought a pair of shoes 970. There was 30 left. He gave 10 yuan to his father, 10 yuan to his mother, and 10 yuan to himself. Finally, he had to return 49 yuan to his parents. He asked: father 49 yuan, mother 49 yuan, and he had 10 yuan, a total of 99 yuan. What about 10 yuan?

When they bought this pair of sports shoes, their parents had already lost 30 / 2 = 15 yuan each, so they each had 500-15 = 485 yuan. Xiaoming gave them 10 yuan each, so they had 485 + 10 = 495 yuan in their hands. They had 485 * 2 = 990 yuan in total, and the 10 yuan in Xiaoming's hands was exactly 1000 yuan, This problem should be taken into account