Question

care este numitorul comun

Answer 1

10/20 + 11/33 + 12/72 = 

se simplifica fractiile = 1/2 + 1/3 + 1/6 

⇒ numitorul comun va fi 6 ⇒ ( 3 + 2 + 1 )/6 = 6/6 = 1 

Answer 2

$\dfrac{10}{20} ^{ \div 10} + \dfrac{11}{33} ^{ \div 11} + \dfrac{12}{72} ^{ \div 12} = \dfrac{1}{2}^{ \cdot3} + \dfrac{1}{3}^{ \cdot2} + \dfrac{1}{6} = \dfrac{3}{6} + \dfrac{2}{6} + \dfrac{1}{6} = \dfrac{6}{6} = 1$