It's already there.
The number is already rounded to exactly the required degree!
900
900
900
920
18
920
To the nearest ten, it would be rounded to 920. To the nearest hundred, it would be rounded to 900.
921 rounded to the nearest ten thousand is 0. Rounded to the nearest thousand is 1000.
920
920
920
920
To the nearest ten, it would be rounded to 920. To the nearest hundred, it would be rounded to 900.
921 rounded to the nearest ten thousand is 0. Rounded to the nearest thousand is 1000.
920
920
920
920
920
920.00
920 is divisible by ten, so there is no need to change it.
577