Correcto: 1/3x1/2=1/6, 4/5 x 1/3=4/15, 2/4:1/2=4/4, 6/2:1/3=18/2, 1/4x2/3=2/12, 2/3:1/3=6/3, Incorrecto: 1/3x1/2=2/5, 4/5x1/2=4/3, 4/4:1/2=3/2, 1/2:1/2= 2/4, 3/4x3/2=6/6, 2/8:3/8=5/8,

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