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Daca a x b = 30 si a x c = 18
calculati:
i) a x ( b+c) : 16
ii) a x ( b-c) : 4


Răspuns :


a x b +a x c= a x (b+c) =48
i ) a x (b +c) :16 = 48:16 =3

ax b - a xc =a x(b-c )=12
ii) a x (b-c ) :4 = 12 :4 = 3