[8/15x3/4x5/4]chia7/8
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\(\dfrac{8^5\cdot15^4}{2^{15}\cdot3^4\cdot5^3}=\dfrac{2^{15}\cdot3^4\cdot5^4}{2^{15}\cdot3^4\cdot5^3}=5\)
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2/15×3/8=6/120=1/20
18/33×7/9=126/297=14/33
24/5÷12/7=24/5×7/12=168/6014/5
Chúc bạn học tốt
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\(\dfrac{3}{4}\times\dfrac{5}{7}=\dfrac{15}{28};\dfrac{5}{8}\times\dfrac{4}{15}=\dfrac{20}{120}=\dfrac{1}{6};\dfrac{7}{12}\times\dfrac{4}{9}=\dfrac{28}{108}=\dfrac{7}{27};\)
\(\dfrac{1}{6}\times\dfrac{3}{5}=\dfrac{3}{30}=\dfrac{1}{10};\dfrac{12}{21}\times\dfrac{23}{8}=\dfrac{276}{168}=\dfrac{23}{14};\dfrac{13}{4}\times\dfrac{5}{39}=\dfrac{65}{156}=\dfrac{5}{12}\)
\(\dfrac{7}{42}\times\dfrac{13}{21}=\dfrac{91}{882}=\dfrac{13}{126};\dfrac{3}{16}\times\dfrac{4}{15}=\dfrac{12}{240}=\dfrac{1}{20}\)
\(\left(\frac{8}{15}x\frac{3}{4}x\frac{5}{4}\right):\frac{7}{8}\)
\(=\frac{1}{2}x\frac{8}{7}=\frac{4}{7}\)
chúc bn hc tốt
[ \(\frac{8}{15}\)x \(\frac{3}{4}\)x \(\frac{5}{4}\)] : \(\frac{7}{8}\)
[\(\frac{24}{60}\)x \(\frac{5}{4}\)] : \(\frac{7}{8}\)
\(\frac{120}{240}\) : \(\frac{7}{8}\)
\(\frac{240}{120}\)x \(\frac{7}{8}\)
\(\frac{1680}{960}\)= \(\frac{7}{4}\)