Sumamos:
[tex]\frac{2}{12} +\frac{1}{3} = \frac{2*3+12*1}{12*3} = \frac{6+12}{36} = \frac{18}{36}[/tex]
Simplificar:
[tex]\frac{18}{36} = \frac{18\div 18}{36\div 18} = \frac{1}{2}[/tex]
Ahora restamos para hallar lo que le falta leer
[tex]\frac{2}{2} -\frac{1}{2} = \frac{1}{2}[/tex]
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Sumamos:
[tex]\frac{2}{12} +\frac{1}{3} = \frac{2*3+12*1}{12*3} = \frac{6+12}{36} = \frac{18}{36}[/tex]
Simplificar:
[tex]\frac{18}{36} = \frac{18\div 18}{36\div 18} = \frac{1}{2}[/tex]
Ahora restamos para hallar lo que le falta leer
[tex]\frac{2}{2} -\frac{1}{2} = \frac{1}{2}[/tex]
Le falta leer 1/2.