Bai 1:
a) $\frac{5^3.16^2}{10^4.4^3}$
=$\frac{5^3.(2^4)^2}{(2.5)^4.(2^2)^3}$
=$\frac{5^3.2^8}{2^4.5^4.2^6}$
=$\frac{5^3.2^8}{2^4.5^4.2^6}$
=$\frac{5^3.2^8}{5^4.2^8.2^2}$
=$\frac{1}{5.2^2}$
=$\frac{1}{5.4}$=$\frac{1}{20}$
b)$\frac{16^11.5^40}{10^41}$
=$\frac{(2^4)^11.5^40}{(2.5)^41}$
=$\frac{2^44.5^40}{2^41.5^41}$
=$\frac{2^3}{5}$
=$\frac{8}{5}$
c)$\frac{2^11.9^2}{6^3.16^2}$
=$\frac{2^11.(3^2)^2}{(2.3)^3.(2^4)^2}$
=$\frac{2^11.3^4}{2^3.3^3.2^8}$
=3
d)$\frac{2^17.20^14}{125^5.2^47}$
=$\frac{2^17.(2^2.5)^14}{(5^3)^5.2^47}$
=$\frac{2^17.2^28.5^14}{5^15.2^47}$
=$\frac{2^45.5^14}{5^15.2^47}$
=$\frac{1}{5.2^2}$
=$\frac{1}{5.4}$
=$\frac{1}{20}$
e)$\frac{21^15.5^17}{3^13.35^15}$
=$\frac{(7.3)^15.5^17}{3^13.(7.5)^15}$
=$\frac{7^15.3^15.5^17}{3^13.7^15.5^15}$
=$3^2$.$5^2$
=(3.5)^2
=15^2
=225
f)$\frac{15^2.9^3}{25^3.27^2}$
=$\frac{(3.5)^2.(3^2)^3}{(5^2)^3.(3^3)^2}$
=$\frac{3^2.5^2.3^6}{5^6.3^6}$
=$\frac{5^2.3^8}{5^6.3^6}$
=$\frac{3^2}{5^4}$
=$\frac{9}{625}$
Bai 2 : (Tu lam de lop 6 no cung lam dc ma :V)
------>Ban oi mik ngoi lam nay gio nen ban cho mik hay nhat nha :(
