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32+4x20-18=712

45x3+24-4x6=1191

45x3+24-4x6=930

dau coroanaaaaaaaaaaaa

Răspuns :

32+4×20-18=712 
(32+4)×20-18=36×20-18=720-18=702

45×3+24-4×6=1191
45×(3+24)-4×6=45×27-4×6=1215-24=1191

45×3+24-4×6=930
(45×3+24-4)×6=(135+24-4)×6=155×6=930

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