a) a=4488 i b=0,0000561
a*b=4488*0,0000561=0,2517768=2,517768*10^{-1}
\frac{a}{b}=\frac{4488}{0,0000561}=80000000=8*10^7
b)
a=450 000 i b=750 000 000
a*b=450 000*750 000 000=4,5*10^5*7,5*10^8=4,5*7,5*10^{5+8}=33,75*10^{13}=
3,375*10*10^{13}=3,375*10^{14}
\frac{a}{b}=\frac{450 000}{750 000 000}=\frac{45}{75000}=0,0006=6*10^{-4}
c)
a=920 000 i b=27 000 000
a*b=920000*27000000=9,2*10^5*2,7*10^7=24,84*10^{12}=
2,484*10*10^{12}=2,484*10^{13}
\frac{a}{b}=\frac{920000}{27000000}=\frac{92}{2700}\approx0,034074\approx 3,4074*10^{-2}
d)
a=20 750 000 i b=0,0000083
a*b=20750000*0,0000083=172,225=1,72225*100=1,72225*10^2
\frac{a}{b}=\frac{20750000}{0,0000083}=\frac{20,75*10^6}{8,3*10^{-6}}=2,5*10^{6-(-6)}=2,5*10^{12}