1-multiplicaciones . calcula: 2/10 x 4/50. 5/8 x 54/8 x 10/4 (sin simplificar). 5/4 x 4/5 (simplifica). Divisiones . calcula 7/4 : 8/5. 54/2 : 4/44 (sin simplificar). 3/3 x 3/3. Suma y resta . Calcula 4/8 + 5/16. 6/30 + 30/15. 32/40 - 44/40. 4/5 - 43-25.
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