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a fost răspuns

1×1+1-1÷1+1= (1×1+1÷1+1)÷1×1= (22-19)×(11-7)= (20÷10)×(24÷4)= (64+8)÷9+38= 12÷2+24÷3+2×4×7-9×2÷3= (5×5-14÷2)÷(45÷5-21÷3=