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calculati tinand cont de paranteze si de ordinea efectuarii operatiilor a)2/3:(1/4+1/2)×27/4


Răspuns :

2/3:(1/4 +1/2*2)×27/4=2/3:(1/4+2/4)×27/4=2/3:3/4×27/4 =2/3×4/3×27/4=(simplificari)2/3×9=2/3 Sper ca te.am ajutat