Rezolva pe caiet calculele de mai jos in doua moduri
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Metoda 1
4 x (2 + 3) = 4 x 5 = 20
(6 + 4) x 5 = 10 x 5 = 50
9 x (8 - 3) = 9 x 5 = 45
(7 - 4) x 8 = 3 x 8 = 24
3 x (12 + 12) = 3 x 24 = 72
(54 - 24) x 2 = 30 x 2 = 60
2 x (120 + 20) = 2 x 140 = 280
3 x (101 - 1) = 3 x 100 = 300
Metoda 2
4 x (2 + 3) = 4 x 2 + 4 x 3 = 8 + 12 = 20
(6 + 4) x 5 = 6 x 5 + 4 x 5 = 30 + 20 = 50
9 x (8 - 3) = 9 x 8 - 9 x 3 = 72 - 27 = 45
(7 - 4) x 8 = 7 x 8 - 4 x 8 = 56 - 32 = 24
3 x (12 + 12) = 3 x 12 + 3 x 12 = 36 + 36 = 72
(54 - 24) x 2 = 54 x 2 - 24 x 2 = 108 - 48 = 60
2 x (120 + 20) = 2 x 120 + 2 x 20 = 240 + 40 = 280
3 x (101 - 1) = 3 x 101 - 3 x 1 = 303 - 3 = 300
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