Xiao Ming borrows 500 yuan from his parents to buy shoes, which is 970 yuan. Then Xiao Peng returns 10 yuan to his parents. That is to say, Xiao Ming owes his parents 490 + 490 + 10 yuan, which is 990 yuan Xiao Ming borrows 500 yuan from his parents to buy shoes, which is 970 yuan. Then Xiao Peng returns 10 yuan to his parents. That is to say, Xiao Ming owes his parents 490 + 490 + 10 yuan, which is 990 yuan Where's 10 more?

I borrowed 500 yuan from my parents and returned 10 yuan to them respectively, which is equivalent to borrowing only 500 + 500-10-10 = 980 yuan. I spent 970 yuan to buy shoes, but I still have 10 yuan in my hand, which is equivalent to 970 + 10 = 980 yuan. The two values are the same. I added the 10 yuan in the wrong place

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1. Xiao Ming asked his mother to borrow 500 yuan and his father to borrow 500 yuan. He used 970 yuan to buy things and left 30 yuan Xiao Ming asked his mother to borrow 500 yuan and his father to borrow 500 yuan. He used 970 yuan to buy things and left 30 yuan. Later, he returned 10 yuan to his mother and 10 yuan to his father. The remaining 10 yuan is for his own use. Now he owes 490 yuan to his mother and 490 yuan to his father. A total of 980 yuan is owed, plus his own 10 yuan, a total of 490 yuan?
2. Borrow 500 from my father, borrow 500 from my mother, it cost 970 to buy things, 30 left, 10 yuan for my father, 10 yuan for my mother, 10 yuan for myself, 490 for my father, 490 for my mother I borrowed 500 from my father and 500 from my mother. It cost 970 to buy things, but there was 30 left, 10 yuan for my father, 10 yuan for my mother, 10 yuan for myself, 490 yuan for my father, 490 yuan for my mother, 980 yuan in total, and 10 yuan for myself, 990 yuan in total. Where is the remaining 10 yuan!
3. Xiao Ming borrowed 500 yuan from his father and 500 yuan from his mother. He spent 970 yuan on a pair of leather shoes, the remaining 30 yuan, returned 10 yuan to his father, 10 yuan to his mother, and kept the remaining 10 yuan himself. So he owed 490 yuan to his father and 490 yuan to his mother, a total of 490 + 490 = 980 yuan, plus the remaining 10 yuan, a total of 990 yuan. Where is the other 10 yuan, and how to calculate it?
4. Today, I went shopping, 500 yuan from my father, 500 yuan from my mother, and bought a pair of shoes. I spent 970 yuan, 30 yuan left, 10 yuan for my father, 10 yuan for my mother, 10 yuan for myself, 490 yuan for my father, 490 yuan for my mother, 490 + 490 = 980. Plus 10 yuan for myself, 980 + 10 = 990, where's 10 yuan
5. I borrowed 500 from my father, borrowed 500 from my mother, bought a pair of shoes, and used 970. The remaining 30 yuan, 10 yuan for my father, 10 yuan for my mother, and 10 yuan for myself I borrowed 500 from my father, borrowed 500 from my mother, bought a pair of shoes, and used 970. The remaining 30 yuan, I returned 10 yuan to my father, 10 yuan to my mother, I left 10 yuan, I owed 490 yuan to my father, 490490 yuan to my mother, 490 yuan = 980. Plus my own 10 yuan = 990 yuan, where are the other 10 yuan? Have you been surrounded?
6. 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?
7. Xiao Ming borrowed 500 yuan from his father and 500 yuan from his mother. It cost 970 yuan to buy a pair of shoes. He returned 10 yuan to his father and 10 yuan to his mother. That's 490 yuan to his father and 490 yuan to his mother, a total of 980 yuan. In addition, Xiao Ming's 10 yuan is 990 yuan. Where is the other 10 yuan
8. Xiao Ming borrows 500 yuan from his mother and 500 yuan from his father to buy a pair of shoes worth 970 yuan. There are 30 yuan left and 10 yuan each to his mother and father, Leave 10 yuan for yourself, 490 yuan for mom and Dad, 490 + 490 = 980 + 10 yuan for yourself, where is the remaining 10 yuan
9. Borrow mom and dad 500, spend 970, leave 30, everyone still 10, leave 10 also owe 490490 * 2 + 10 equal to 990 yuan, where is the remaining 10 yuan?
10. The child asked his mother for 500 yuan and his father for 500 yuan for his birthday. He bought a pair of shoes and used 970 yuan, leaving 30 yuan. He returned 10 yuan to his mother, 10 yuan to his father, and 10 yuan to himself. That is to say, he now owes his mother 490 yuan and his father 490 yuan, plus his 10 yuan 490 × 2 + 10 = 990 yuan, where is the remaining 10 yuan?
11. Xiao Ming borrows 500 yuan each from his parents to buy a pair of 970 yuan shoes, gets 30 yuan back and returns 10 yuan each to his parents, but he only owes 490 yuan and 49 yuan each to his parents 0 times 2 plus 10 yuan left, why only 990 yuan?
12. Xiao Ming asked his parents that they borrowed 500 and bought a pair of 970 shoes, and gave them 10 yuan for the remaining 30. So 490 + 490 + 10 = 990, where is the other 10
13. Xiao Ming borrowed 500 yuan from his parents, used 970 yuan to buy shoes, returned 10 yuan to his parents, and owed 490 yuan to his parents. The total was 980 yuan, and the total was 990 yuan. Where is the other 10 yuan?
14. Xiao Ming borrowed 500 yuan from his parents and bought a pair of 970 yuan shoes. Xiao Ming gave the remaining 30 yuan to his mother, 10 yuan to his father, and left 10 yuan for himself. So now he owes 490 yuan to his father and 490 yuan to his mother, so he owes 980 yuan, plus his 10 yuan, only 990 yuan. Q: where's the other 10 yuan?
15. Xiao Ming borrows 500 yuan from his parents. It costs 970 yuan to buy shoes. He has 30 yuan left, 10 yuan for his mother, 10 yuan for his father, and 10 yuan for himself. He still owes 490 yuan to his father and 490 yuan to his mother. The total is 980 yuan. With his 10 yuan, the total is 990 yuan. But where is the 10 yuan? Please explain
16. I borrowed 500 yuan from my father, 500 yuan from my mother, 970 yuan for shoes, 30 yuan left, 10 yuan returned to my father, 10 yuan returned to my mother, 10 yuan left by myself, 490 yuan owed to my father, 490 yuan owed to my mother, 490 plus 490 is equal to 980 yuan, plus my own 10 yuan is equal to 990 yuan, where is the remaining 10 yuan?
17. I borrowed 500 yuan from my father and 500 yuan from my mother. I used 970 yuan to buy a pair of shoes. I have 30 yuan left. I return 10 yuan to my father and 10 yuan to my mother. I still have 10 yuan. I owe 490 yuan to my father and 490 yuan to my mother. 490 + 490 = 980 yuan. Plus my 10 yuan = 990 yuan, where is the remaining 10 yuan?
18. Dad 500 yuan, mom 500 yuan, Xiao Mingmu has money, Xiao Ming borrowed 500 yuan from his parents, now 1000 yuan for a pair of shoes, 970 yuan is left 500 yuan for Dad 500 yuan for mom Xiao Mingmu is rich. Xiao Ming borrows 500 yuan from his parents. Now 1000 yuan for a pair of shoes. 970 yuan is left. 30 yuan is left. 10 yuan is returned to his father. 10 yuan is returned to his mother. Now he owes 490 yuan to his father. 490 + 490 = 980 + 10 yuan = 990 yuan. Where is 10 yuan left?
19. I borrowed 500 yuan from my father, 500 yuan from my mother, and used 970 yuan to buy a pair of shoes. The remaining 30 yuan, I returned 10 yuan to my father and 10 yuan to my mother, I owe my father 490, I owe my mother 490490 plus 490 = 980 plus my own ten = 990. Where are the other ten?
20. Xiao Ming borrows 500 yuan from his mother and 500 yuan from his father to buy clothes. He spends 970 yuan and 30 yuan to return 10 yuan to his parents. Xiao Ming still has 10 yuan to ask how much he owes his parents