Question

(-2020 )+2021+21+(-22)

Answer 1

\(\left(-2020\right)+2021+21+\left(-22\right)\)

\(=1+21+\left(-22\right)\)

\(=22+\left(-22\right)\)

\(=0\)

Answer 2

Lời giải:

$(-2020)+2021+21+(-22)=(-2020+2021)+(21-22)=1+(-1)=0$