Calculeaza in doua moduri:

Rezolvare

a) 2 x (3 + 5) =
Modul 1: 2 x (3 + 5) = 2 x 8 = 16
Modul 2: 2 x (3 + 5) =2 x 3 + 2 x 5 = 6 + 10 = 16


b) 6 x (9 - 5) =
Modul 1: 6 x (9 - 5) = 6 x 4 = 24
Modul 2: 6 x 9 - 6 x 5 = 54 - 30 = 24

c) (4 + 3) x 5 =
Modul 1: (4 + 3) x 5 = 7 x 5 = 35
Modul 2: (4 + 3) x 5 = 4 x 5 + 3 x 5 = 20 + 15 = 35



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