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am nevoie de ajutor.45:5×6-42:6:7,200-9×9+8×7,4×2×6+63:7:3,157+72:8-6×8. DAU COROANĂ​

Răspuns :

1)45:5x6-42:6:7=9x6-7:7=54-1=53

2)200-9x9+8x7=200-81+56=119+56=175

3)4x2x6+63:7:3=8x6+9:3=48+3=51

4)157+72:8-6x8=157+9-48=166-48=118