Problem asked——find a quick and easy method to compute the sum of the first 100 counting numbers. no calculators allowed.

i have to write 3 to 4 paragraphs on how i got the answer and i don’t understand this problem. it’s barely 10 and i’m extremely exhausted, i want nothing more than to sleep but of course, me being stupid, i have to do this as it’s due tomorrow first period and i couldn’t do it any sooner. i can figure out what to write for each paragraph but me and tell me what quick and easy method is supposed to be used for this i know the final answer but the main question asked is what easy method was supposed to be used. . it sucks to be me right now.