Answer:
1: 35,620 -> 35,600 -> 36,000 -> 40,000
2: 54,390 -> 54,400-> 54,000 -> 50,000
3: 159,100 -> 160,000 -> 200,000
4: 90,890 -> 90,900 -> 91,000 -> 90,000
5: 39,739 -> 39,740 -> 40,000
6: 9,650 -> 9,600 -> 10,000
7: 12,450 -> 12,500 -> 13,000 -> 10,000
Explanation: