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a fost răspuns

calculati : (45:5+45:9):7+2×10:10 ; (100-60-30)×5+(10-6:3):8 ; (9×7-6:3)-(81-8×8) ; 73-4×3+(53-24:8×6) ; (14+8:8):5+5-(29-3:3):4 .