1. 742*10^4
2.31100000>25000000; 7,2/10^5<7,2/10^4 ; 8,3/10^9<5,6*10^8
3.7,22*10^8/10^6=7,22*10^2=722 км^2
4.5^(13+(-11))=5^2=25
х^(18-13)=х^5
х^2*5=х^10
х^7у^7
х^3/9
5.9^-8*3^-2*81^0/27^-7=3^(2*-8)*3^-2*1/3^(-7*3)=3^-18/3^-21=3^(-18-(-21))=3^3=27
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1. 742*10^4
2.31100000>25000000; 7,2/10^5<7,2/10^4 ; 8,3/10^9<5,6*10^8
3.7,22*10^8/10^6=7,22*10^2=722 км^2
4.5^(13+(-11))=5^2=25
х^(18-13)=х^5
х^2*5=х^10
х^7у^7
х^3/9
5.9^-8*3^-2*81^0/27^-7=3^(2*-8)*3^-2*1/3^(-7*3)=3^-18/3^-21=3^(-18-(-21))=3^3=27