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\(24m=\frac{24}{1000}km=\frac{3}{125}km.\)
6 yến = \(\frac{6}{100}\)tấn = \(\frac{3}{50}\)tấn.
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\(\frac{1515}{1717}=\frac{1515\div101}{1717\div101}=\frac{15}{17}\)
24m = \(\frac{24}{1000}\)km = \(\frac{3}{125}\)km
6 yến = \(\frac{6}{100}\)tấn = \(\frac{3}{50}\)tấn
\(\frac{1515}{1717}\)= \(\frac{15}{17}\)
\(\dfrac{90}{120}=\dfrac{30.3}{30.4}=\dfrac{3}{4}\)
\(\dfrac{15}{25}=\dfrac{5.3}{5.5}=\dfrac{3}{5}\)
\(\dfrac{18}{45}=\dfrac{9.2}{9.5}=\dfrac{2}{5}\)
\(\dfrac{36}{64}=\dfrac{4.9}{4.16}=\dfrac{9}{16}\)
\(\dfrac{32}{72}=\dfrac{8.4}{8.9}=\dfrac{4}{9}\)
\(\dfrac{84}{49}=\dfrac{7.12}{7.7}=\dfrac{12}{7}\)
\(\dfrac{90}{120}=\dfrac{3}{4};\dfrac{15}{25}=\dfrac{3}{5};\dfrac{18}{45}=\dfrac{2}{5};\dfrac{36}{64}=\dfrac{9}{16};\dfrac{32}{72}=\dfrac{4}{9};\dfrac{84}{49}=\dfrac{12}{7}\)
\(\dfrac{35}{210}=\dfrac{35:35}{210:35}=\dfrac{1}{6}\)
\(\dfrac{34}{68}=\dfrac{34:34}{68:34}=\dfrac{1}{2}\)
\(\dfrac{64}{720}=\dfrac{64:8}{720:8}=\dfrac{8}{90}\)
Lời giải:
$\frac{35}{210}=\frac{35}{35\times 6}=\frac{1}{6}$
$\frac{34}{68}=\frac{34}{34\times 2}=\frac{1}{2}$
$\frac{64}{720}=\frac{8\times 8}{8\times 90}=\frac{8}{90}=\frac{4\times 2}{2\times 45}=\frac{4}{45}$
a) \(\dfrac{2}{10}=\dfrac{2:2}{10:2}=\dfrac{1}{5}\)
b) \(\dfrac{9}{6}=\dfrac{9:3}{6:3}=\dfrac{3}{2}\)
c) \(\dfrac{5}{20}=\dfrac{5:5}{20:5}=\dfrac{1}{4}\)
d) \(\dfrac{6}{16}=\dfrac{6:2}{16:2}=\dfrac{3}{8}\)
a)\(\frac{2525}{2727}\)không rút gọn được. b)\(\frac{7}{20}\) = \(\frac{42}{120}\);\(\frac{23}{30}\) = \(\frac{92}{120}\);\(\frac{34}{40}\) = \(\frac{102}{120}\);\(\frac{53}{60}\) = \(\frac{106}{120}\)
\(\frac{135135}{500500}\)= \(\frac{57027}{100100}\)
\(\frac{135153153}{170170170}\)=\(\frac{45051051}{56723390}\)
\(\frac{135135}{504504}=\frac{135135:9009}{504504:9009}=\frac{15}{56}\)
\(\frac{136136}{368368}=\frac{136136:8008}{368368:8008}=\frac{17}{46}\)