Question

find the sum of 1+2+3+4+...................+98+99+100.estimate the answer to nearest hundred

Answer 1

5050
it forms ap common difference is 1 and no. of terms is 100

Answer 2

hlo to find the sum of these numbers
there is a formula .

these are natural number
( General formula )

so sum of nature number= n{(n+1)/2}

=>n=100
put in for formula we get
100{(100+1)/2}
100×(101/2
50×101

=5050