Assuming you are asking how many times the digit 1 appears when writing the numbers 400 to 500:
It appears in the tens place once (41x where x is any digit 0-9) so there will be 10 occurrences of it here.
It appears in the ones place for every digit in the tens place (4x1) so there will be 10 occurrences of it here.
However, the number 411 has been counted twice, once as 41x and again as 4x1.
Thus the digit 1 will be written 10 + 10 - 1 = 19 times.
400/500 = 400 ÷ 500 = 0.8
200 + 300 200 + 200 + 100
500
The hundreds, on either side of 449 are 400 and 500. 449 is 49 away from 400, and 51 away from 500. So the nearest hundred is 400.
It is closer to 500.
400 + 500 = 900
400 multiplied by 500 is 200,000.
one fifth as long as 500
Depends on body weight but I'd say 400-500
500 multiplied by 400 is 200,000.
around 400-500
there are only about 400-500