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Grupeaza oricare doi factori in direrite moduri,calculeazasi compara rezultatele.
(145x2)x36=
(73x125)x47=
(15x14)x147=
16x(12x104)=


Răspuns :

(145x2)x36=290×36=10440
(73x125)x47=9125×47=428875
(15x14)x147=210×147=30870
16x(12x104)=16×1248=19968
cum compara-le e simplu
10440 ≤428875
30870 ≥19968