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Calculeaza in doua moduri: a)5*(7+3)= b)5*(7+3)= cea dea doua a)(8-2)*4= b)(8-2)*4=

Răspuns :

5*(7+3)= 5*10=50
           =5*7+5*3=35+15=50
(8-2)*4=6*4=24
          =8*4-2*4=32-8=24