Пошаговое объяснение:
a) (3³-(-4)²)•(-9)=(27-16)•(-9)=11•(-9)= -99
б) (-1 3/4)²:(2/4)³=(-7/4)²:8/64=
=49/16:1/8=49/16•8/1=(49•8)/(16•1)=
=49/2=24,5
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Пошаговое объяснение:
a) (3³-(-4)²)•(-9)=(27-16)•(-9)=11•(-9)= -99
б) (-1 3/4)²:(2/4)³=(-7/4)²:8/64=
=49/16:1/8=49/16•8/1=(49•8)/(16•1)=
=49/2=24,5