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calculati in doua moduri 18×2+18×4+18×6=216​

Răspuns :

Metoda I - Ordinea operațiilor:

18 · 2 + 18 · 4 + 18 · 6 =

⠀⠀⠀⠀ = 36 + 18 · 4 + 18 · 6 =

⠀⠀⠀⠀ = 36 + 72 + 18 · 6 =

⠀⠀⠀⠀ = 36 + 72 + 108 =

⠀⠀⠀⠀ = 108 + 108 =

⠀⠀⠀⠀ = 216

Metoda II - Factor comun:

⠀⠀⠀⠀ 18 · 2 + 18 · 4 + 18 · 6 =

⠀⠀⠀⠀ = 18 · ( 2 + 4 + 6 ) =

⠀⠀⠀⠀ = 18 · 12 =

⠀⠀⠀⠀ = 216