36:4x5+2x25-8
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180 : { 300 : [ 450 - ( 4 . 53 - 22 . 25 )]}
= 180 : { 300 : [ 450 - ( 4 . 125 - 4 . 25 )]}
= 180 : { 300 : [ 450 - ( 500 - 100 )]}
= 180 : { 300 : 50 }
= 180 : 6
= 30
180: ( 300: ( 450 - (4 x 53 - 22x 25)))
=180: ( 300: ( 450 - ( 500 - 100 )))
=180: ( 300: ( 450 - 400 ))
=180: ( 300: 50)
=180: 6 = 30\(a)4\cdot8\cdot16^2=2^2\cdot2^3\cdot\left(2^4\right)^2=2^5\cdot2^8=2^{13}\\ b)4^3\cdot64=\left(2^2\right)^3\cdot2^6=2^6\cdot2^6=2^{12}\\ c)3^4\cdot9\cdot27^2=3^4\cdot3^2\cdot\left(3^3\right)^2=3^4\cdot3^2\cdot3^6=3^{12}\\ d)16^2\cdot9^4=\left(2^4\right)^2\cdot\left(3^2\right)^4=2^8\cdot3^8=\left(2\cdot3\right) ^8=6^8\\ e)25\cdot5\cdot125=5^2\cdot5\cdot5^3=5^6\\ g)81\cdot3^3=3^4\cdot3^3=3^7\\ h)125^2\cdot25^4=\left(5^2\right)^2\cdot\left(5^2\right)^4=5^4\cdot5^8=5^{12}\\ i)4^2\cdot25=4^2\cdot5^2=\left(4\cdot5\right)^2=20^2\)
\(\left(\frac{8}{15}x\frac{3}{4}x\frac{5}{4}\right):\frac{7}{8}\)
\(=\frac{1}{2}x\frac{8}{7}=\frac{4}{7}\)
chúc bn hc tốt
\(\dfrac{3}{4}\times\dfrac{5}{7}=\dfrac{15}{28};\dfrac{5}{8}\times\dfrac{4}{15}=\dfrac{20}{120}=\dfrac{1}{6};\dfrac{7}{12}\times\dfrac{4}{9}=\dfrac{28}{108}=\dfrac{7}{27};\)
\(\dfrac{1}{6}\times\dfrac{3}{5}=\dfrac{3}{30}=\dfrac{1}{10};\dfrac{12}{21}\times\dfrac{23}{8}=\dfrac{276}{168}=\dfrac{23}{14};\dfrac{13}{4}\times\dfrac{5}{39}=\dfrac{65}{156}=\dfrac{5}{12}\)
\(\dfrac{7}{42}\times\dfrac{13}{21}=\dfrac{91}{882}=\dfrac{13}{126};\dfrac{3}{16}\times\dfrac{4}{15}=\dfrac{12}{240}=\dfrac{1}{20}\)
\(36:4x5+2x25-8\\ =9x5+50-8\\ =45+50-8\\ =95-8=87\)
36:4x5+2x25−8
=9x5+50−8
=45+50−8
=95−8
=87