The sum of the numbers from 1 to 100 can be calculated using the formula for the sum of an arithmetic series:

Sum = (n/2)(first term + last term)

In this case, the first term is 1 and the last term is 100, so the sum is:

Sum = (100/2)(1 + 100)
= 50(101)
= 5050

Therefore, the sum of the numbers from 1 to 100 is 5050.