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Calculează , respectând ordinea efectuării operatiilor : a) 327+146+3027-543-1472+615 = , B) 1210-936-136+2536-877+952-400 = , c) 16:4×3×12:6:4×5 = , d) 25×25:5:5×6:3×10 = , e) 12×15:18×100:4:50×3 = , f) 1000-409×6:3+56:7×6 = , g) 6×34-120:5+11×22 = , h) 180:9-16+21+144:8+255:3= ....