There are 10 one digit positive integers (0 - 9) and 9 one digit negative integers (-9 to -1) making 19 in all.
-23
There are 90 positive two-digit integers, ranging from 10 to 99. This is calculated by subtracting the smallest two-digit integer (10) from the largest (99) and then adding one: (99 - 10 + 1 = 90).
4
the answer would be 900
There are 4500 such numbers.
28
There are 352.
-23
90
4
There are 8*8 = 64 such numbers.
the answer would be 900
500
There are 4500 such numbers.
54
There are one thousand. Starting at 2000 and going to 2999
there are 999 - 100 + 1 = 900 positive triple digit positive integers, between 100 and 999.(e.g. there are 102 - 100 + 1 = 3 triple digit integers between 100 and 102,namely 100, 101 and 102.)multiply that by 2 to take in consideration of the negative integers,you have 1800 triple digit integers.