Question

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

Answer 1

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

=(101-100)+(99-98)+...+(3-2)

=1x101

=101

Answer 2

xin lỗi

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

=(101-100)+(99-98)+...+(3-2)

=1x50,5

=50,5