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fara a efeczu calcule scrie a daca sunt adevarate sau f daca sunt false
a)(7+5)×5=7×5=7×5+5×5
b) (9+3)×2=9×2+3+2
c) 5+(3+2)=5×(3+2)
d) 4×(9-5) =4×(9+5)


Răspuns :

a)12*5=7*5=7*5+5*5 
60=35=50 FALS
b)12*2=18+3+2
24=23 FALS
c)5+5=5*5
10=25 FALS
d)4*4=4*14
16=56 FALS