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Efectuaţi:a)3*1/4=...b)15*3/5=...c)12*5/4=...d)30*4/25=...e)7*2 din 1/4=...f)6 din 2/3 *9=...g)12/5*1/18=...h)2/9*3/10=...i)11/45*25/22=...j)13/14*49/26=...k)3*2/7 * 2 din 1/3=...l)3*2/3*2 din1/2 * 6=...