Denominadores múltiplos

Calcula mentalmente:

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1/4 + 1/2 = Rellenar huecos (1): JXUwMDZiJXUwMDFjJXUwMDFi	1/2 + 2/6 = Rellenar huecos (2): JXUwMDZkJXUwMDFhJXUwMDE5	1/16 + 3/8 = Rellenar huecos (3): JXUwMDZmJXUwMDE4JXUwMDFlJXUwMDA3
3/4 - 1/2 = Rellenar huecos (4): JXUwMDY5JXUwMDFlJXUwMDFi	3/10 - 1/5 = Rellenar huecos (5): JXUwMDY5JXUwMDFlJXUwMDFlJXUwMDAx	1/8 - 1/16 = Rellenar huecos (6): JXUwMDY5JXUwMDFlJXUwMDFlJXUwMDA3
1/6 + 1/3 = Rellenar huecos (7): JXUwMDZiJXUwMDFjJXUwMDE5	1/8 + 1/2 = Rellenar huecos (8): JXUwMDZkJXUwMDFhJXUwMDE3	1/3 - 1/6 = Rellenar huecos (9): JXUwMDY5JXUwMDFlJXUwMDE5