402 rounded to the nearest 10 would be 400. To round to the nearest ten, numbers that end in 1 through 4 should be rounded down to the next lowest number that ends in 0. So 73 would be rounded to 70, 622 would be rounded to 620 and so forth.
For numbers that end in 5 through 9, round up to the next even ten. So 89 would be rounded to 90 and 545 would be rounded to 550 and so forth.
400
400
402 to the near hundred
400
10 because 8 is to small to have this and 10 is the first ten there is
400
1140
It is 400
990000
400
400
402.000
402 to the near hundred
400
400
Both 400
8 is already rounded to the nearest 10th. Rounded to the nearest 10 is 10.