Answer:
8160, 8280, 8040
Explanation:
Interesting question! You've actually seen things like this in real life but may not realize it. Do you drive? The speedometer in the car, does it have a numeral at every little tick mark? Probably not.
Maybe you've looked at an old-school thermometer that might just show every 10 degrees, but there are little tick marks in between the numbered lines. Maybe every degree, possibly every two degrees.
That's all that's going on here, it's a number line. Are the two labels 8,100 and 8,200? And not 8.100 and 8.200? The concept works either way, so I'll assume they're thousands.
Count the little tick marks from 8,100 until you get to 8,200:
one....two...three...four...five (count the one when you land on 8200). Did you get 5? I'm not being condescending, you really need to do that, whether it's your speedometer or a pressure gauge or whatever.
Now look at the spaces or "divisions" between 8100 and 8200: there are 5, right? So if we went the distance of "100" (8200 - 8100), and that's divided into 5 equal parts, then isn't each part 100/5 = 20 wide?
Go back to 8100 and start counting by 20's:
8120....8140...8160...8180...8200
That's how this works, and if you understand it now then you can answer the 3 questions. Do you want to do that on your own, or should I go on?
Go on? Okay.
A is 3 ticks past 8100. Each tick is 20, so A is 60 past 8100. 8100 + 60 = 8160.
B is 4 ticks past 8200, so it's 8280.
C is 3 ticks below 8100, so 8100 - 60 = 8040. Or with any of these, you could count by 20's at each tick mark. So with this one you'd go, "8080, 8060, 8040, done."
I hope you read all that and that it made sense. It's just a number line and you need to figure out how wide the un-numbered divisions are. Take care and good luck.