Question

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1, tính

a, 27/36

b, 24/128

c, 64/216

d,( -5 )⁷ / 625

e, 81 / (-9)⁵

f, 900/(-30)

Answer 1

[Quỳnh Anh]

Trả lời:

a, \(\frac{27}{36}=\frac{3.3.3}{3.3.4}=\frac{3}{4}\)

b, \(\frac{24}{128}=\frac{3.8}{16.8}=\frac{3}{16}\)

c, \(\frac{64}{216}=\frac{8.8}{8.27}=\frac{8}{27}\)

d, \(\frac{\left(-5\right)^7}{625}=\frac{-5^7}{5^4}=-5^3\)

e, \(\frac{81}{\left(-9\right)^5}=\frac{9^2}{-9^5}=\frac{1}{-9^3}=-\frac{1}{9^3}\)

f, \(\frac{900}{-30}=\frac{30.30}{-30}=-\frac{30.30}{30}=-30\)

Answer 2

[Ga'l wes]

a. \(\frac{27}{36}=\frac{3}{4}=0,75\)

b. \(\frac{24}{128}=\frac{3}{16}=0,1875\)

c. \(\frac{64}{126}=\frac{32}{63}\)

d. \(\frac{\left(-5\right)^7}{625}=\frac{-78125}{625}=-625\)

e. \(\frac{81}{\left(-9\right)^5}=\frac{81}{-59049}=\frac{-81}{59049}=\frac{-1}{729}\)

f . \(\frac{900}{\left(-30\right)}=\frac{-900}{30}=-30\)