a: \(=3^{30}:3^{28}-7=9-7=2\)
a)
\(\left(97-74\right)^{30}:3^{28}-7\\ =3^{30}:3^{28}-7\\ =3^2-7\\ =9-7\\ =2\)
b)
\(44+6.\left(1995-1985\right)^2\\ =44+6.10^2\\ =44+6.100\\ =44+600\\ =644\)
c)
\(289.598+289.102-700.287\\ =289.\left(598+102\right)-700.287\\ =289.700-700.287\\ =700.\left(289-287\right)\\ =700.2\\ =1400\)
a)
(97−74)30:328−7
=330:328−7
=32−7
=9−7
=2
b)
44+6.(1995−1985)2
=44+6.102
=44+6.100
=44+600
=644
c)
289.598+289.102−700.287
=289.(598+102)−700.287
=289.700−700.287
=700.(289−287)
=700.2
=1400
