1、-(4/3)×(-1 2/1)÷(-2 4/1)2、-9×(-11)÷3÷(-3)

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1、-(4/3)×(-1 2/1)÷(-2 4/1)
2、-9×(-11)÷3÷(-3)

-(4/3)×(-1 2/1)÷(-2 4/1)=-2/3
-9×(-11)÷3÷(-3)99/3/-3=-11

-(4/3)×(-1 2/1)÷(-2 4/1)
=4/3×3/2÷(-2 4/1)
=2÷(-2 4/1)
=4.5