a digit
390 480 570
1000
5, 10, 15 any multiple of 5
The digit in the ten millions place in 56907316 is 0.
Any multiple of ten ends with the digit 0.
One million (1,000,000).
9876543120
a digit
Any multiple of ten. 10
390 480 570
1000
A digit.
A digit.
635 estimated to the nearest ten is 640. When estimating a number to the nearest ten, you look at the digit in the ones place. If that digit is 5 or greater, you round up to the next multiple of ten. In this case, 635 has a 5 in the ones place, so you round up to 640.
9
I believe there are 81. There are 9 after every multiple of 10, including 90.