Question

1+2+3+4+5+6+7+8+9+10+11+12+...+1000

Answer 1

=1000000000000.....................................................................................................................................................................................................................................................................................................................................00000078

Answer 2

\(1+2+3+4+5+...+1000\)

\(=\left(1000+1\right)\left[\left(1000-1\right):1+1\right]:2\)

\(=1001.500\)

\(=500500\)

Answer 3

Số lượng số = ( 1000 - 1 ) : 1 + 1 = 1000

Tổng = ( 1000 + 1 ) x 1000 : 2    =   500500

Học tốt nha bn <3