a: \(=27\left(79+25-4\right)=2700\)
b: \(=6-1=5\)
c: \(=\left(7^5+7^9\right)\left(5^4+5^6\right)\left(81-81\right)=0\)
a)27.79+25.27-4.3 mũ 3
=27.79+25.27-4. 27
=27.(79+25-4)
=27.100
=2700
a: =27(79+25−4)=2700=27(79+25−4)=2700
b: =6−1=5=6−1=5
c: =(75+79)(54+56)(81−81)=0