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calculati:2020×2019-2018×2019-2019​

Răspuns :

Răspuns:

[tex]2019 \times (2020 - 2018 - 1) \\ 2019 \times 1 \\ 2019[/tex]

2020×2019 - 2018×2019 - 2019​ =

= 2019×(2020 - 2018 - 1)

= 2019×(2020 - 2019)

= 2019×1

= 2019