Observa modelul de la punctul d) si rezolva in doua moduri

Rezolvare


a)
4 x (5 + 4) = 4 x 9 = 36
4 x (5 + 4) = (4 x 5) + (4 x 4) = 20 + 16 = 36

b)
(6 + 2) x 5 = 8 x 5 = 40
(6 + 2) x 5 = (6 x 5) + (2 x 5) = 30 + 10 = 40


c)
5 x (7 + 2) = 5 x 9 = 45
5 x (7 + 2) = (5 x 7) + (5 x 2) = 35 + 10 = 45

d)
(6 + 3) x 3 = 9 x 3 = 27
(6 + 3) x 3 = (6 x 3) + (3 x 3) = 18 + 9 = 27

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