take the number to the right of the underlined digit. if its 4 or less, the digits of the underlined one to the left stay the same, while the digits on the right are turned into 0's.
I'll do a few to help you out:
1. *1*60,656 = 200,000
2. *1*49,590 = 100,000
3. 117,*8*21 = 117,800
