Question

[Phan Tran Nhu Tam]

B=1,2+2,3+3,2+4,5+5,6...98,99+99,100

tinh ket qua cua B

Answer 1

[Đỗ Ngọc Hải]

B=(1+2+3+4+...+98+99)+(0,1+0,2+0,3+0,4+...+0,99)

  =4950+53,55=5003,55