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7. Calculați: 60 a) 1 + 64 : 8 : 2 + 72:9x5+9x5=105 45 b)2-(4-36:9:3)=7 10 10 c) (54 +46): 10 x (1 +63: 7) = 100 d) 8 x 4-(1+27:3+24:4+2 x 8) = e) 81:9 x (24:4+72:8-100: 10-35:7)= f) 10 x 3 - (12+72:8-4 x 4 ) x 8: (2x5)= K​