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15ori2ori5ori5ori5=
9ori9ori5ori44=


Răspuns :

9*9*5*44=17820
15*2*5*5*5=3750

15×2×5×5×5=3750
15×2=30
30×5=150
150×5=750
750×5=3750

9×9×5×44=17820

La fel se procedeaza si la al 2 -lea exercitiu .