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Calculează: 2/7 + 3/7 1/9 + 5/9 7/5 + 3/5 20/10 + 15/10 7/100 + 4/100 11/19/100 14 12 14/55 12/5 13/7 5/7 27/10 11/10 24/10 9/10 33/100 17/100 13/100 4/100 1 + 5/6 = 2/3 + 1 1 + 3 / 10 1-3/10 1 2/3 7/5 1 18 / 7-1​

Calculează 27 37 19 59 75 35 2010 1510 7100 4100 1119100 14 12 1455 125 137 57 2710 1110 2410 910 33100 17100 13100 4100 1 56 23 1 1 3 10 1310 1 23 75 1 18 71 class=