Question

46-44+44-42+42-40....4-2

Answer 1

\(46-44+44-42+42-40+...+4-2\)

\(=46-2\)

\(=44\)

Answer 2

Ta có \(46-44+44-42+42-40+40+...+4-2\)

\(=46+\left(-44+44\right)+\left(-42+42\right)+...+\left(-4+4\right)-2\)

\(=46-2\)

\(=44\)