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TL:
\(\frac{12}{100}\)= 0,12
\(\frac{5}{100}\)= 0,05
\(\frac{306}{1000}\)= 0,306
-HT-
\(\frac{3}{18}=\frac{1}{18}+\frac{2}{18}=\frac{1}{18}+\frac{1}{9}\)
\(\frac{13}{27}=\frac{1}{27}+\frac{12}{27}=\frac{1}{27}+\frac{3}{27}+\frac{9}{27}=\frac{1}{27}+\frac{1}{9}+\frac{1}{3}\)
\(\frac{1}{6}=\frac{1}{8}+\frac{1}{24}=\frac{1}{9}+\frac{1}{18}\)
\(\frac{3}{35}=\frac{1}{35}+\frac{1}{35}+\frac{1}{35}=\frac{1}{70}+\frac{1}{14}\)
Nếu đúng thì k mk nha
21/70=3/10
60/75=80/100
14/35=40/100
107/125=856/1000
75/300=25/100
46/500=92/1000
=13/12x14/13x15/14x16/15x...x2006/2005x2007/2006x2008/2007
=2008/12
=502/3
A = 1\(\dfrac{1}{12}\) \(\times\) 1\(\dfrac{1}{13}\) \(\times\) 1\(\dfrac{1}{14}\) \(\times\) 1\(\dfrac{1}{15}\) \(\times\) ... \(\times\) 1\(\dfrac{1}{2005}\) \(\times\) 1\(\dfrac{1}{2006}\) \(\times\) 1\(\dfrac{1}{2007}\)
A = ( 1 + \(\dfrac{1}{12}\)) \(\times\) ( 1 + \(\dfrac{1}{13}\)) \(\times\) ( 1 + \(\dfrac{1}{14}\)) \(\times\)...\(\times\) ( 1 + \(\dfrac{1}{2006}\))\(\times\)(1+\(\dfrac{1}{2007}\))
A = \(\dfrac{13}{12}\) \(\times\) \(\dfrac{14}{13}\) \(\times\) \(\dfrac{15}{14}\) \(\times\) ...\(\times\) \(\dfrac{2007}{2006}\) \(\times\) \(\dfrac{2008}{2007}\)
A = \(\dfrac{13\times14\times15\times...\times2007}{13\times14\times15\times...\times2007}\) \(\times\) \(\dfrac{2008}{12}\)
A = 1 \(\times\) \(\dfrac{502}{3}\)
A = \(\dfrac{502}{3}\)
\(\dfrac{18}{36}=\dfrac{18:18}{36:18}=\dfrac{1}{2}=\dfrac{1.5}{2.5}=\dfrac{5}{10}\)
\(\dfrac{14}{35}=\dfrac{14:7}{35:7}=\dfrac{2}{5}=\dfrac{2.2}{5.2}=\dfrac{4}{10}\)
\(\dfrac{27}{45}=\dfrac{27:9}{45:9}=\dfrac{3}{5}=\dfrac{3.2}{5.2}=\dfrac{6}{10}\)
\(\dfrac{40}{50}=\dfrac{40:10}{50:10}=\dfrac{4}{5}=\dfrac{4.2}{5.2}=\dfrac{8}{10}\)
Lưu ý : \(.\) = \(\times\)