find a quick, easy metod to compute the first 100 number, fr

[babyZ]

i am stuck the question is, Find a quick, easy method to compute the first 100 number, from 1 to 100. I can`t use a calculator as a metod for this problem

[Martingale]

i am stuck the question is, Find a quick, easy method to compute the first 100 number, from 1 to 100. I can`t use a calculator as a metod for this problem

What do you mean by 'compute the first 100 number'?

[babyZ]

plus them all together

[Martingale]

plus them all together

the sum of the first n numbers is given by n(n+1)/2

[stapel_eliz]

In case you're not familiar wtih variables yet, see if you can find the pattern here:

1 + 100 = 101
2 + 99 = 101
3 + 98 = 101
...

How many of these pairs are there? What is their sum? Does this account for all of the numbers between 1 and 100?

[babyZ]

50x101=5050
thnx