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a)3,7*10^5+5,2*10^4=10^4(3,7*10+5,2)=42,2*10^4
3,7*10^5-5,2*10^4=10^4(3,7*10-52)=32,8*10^4
b)1,2*10^13+9,8*10^12=10^12(1,2*10+9,8)=21,8*10^12
1,2*10^13-9,8*10^12=10^12(1,2*10-9,8)=2,2*10^12
c)7,875*10^3+5*10^-2=7,875*10^3+0,2*10^2=10^2(7,875*10+0,2)=78,95*10^2
7,875*10^3-5*10^-2=7,875*10^3-0,2*10^2=10^2(7,875*10-0,2)=78,55*10^2
2)
2,5*10^9 g =2,5*10^3 t