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\(a,5=\dfrac{20}{4};11=\dfrac{44}{4};21=\dfrac{84}{4};200=\dfrac{800}{4};125=\dfrac{500}{4};2000=\dfrac{8000}{4}\\ b,2=\dfrac{108}{54};3=\dfrac{108}{36};108=\dfrac{108}{1};1=\dfrac{108}{108};9=\dfrac{108}{12};4=\dfrac{108}{27};6=\dfrac{108}{18}\)
\(10=\dfrac{10\cdot6}{6\cdot1}=\dfrac{60}{6}\)
\(6=\dfrac{6\cdot6}{1\cdot6}=\dfrac{36}{6}\)
\(101=\dfrac{101\cdot6}{6}=\dfrac{606}{6}\)
\(9=\dfrac{9\cdot6}{6}=\dfrac{54}{6}\)
\(22=\dfrac{22\cdot6}{6}=\dfrac{132}{6}\)
a: 5/3=10/6=25/15=35/21
b: 5/7=35/49
6/15=12/30
4/5=16/20
c: 6=216/36=324/54=108/18
a)\(\dfrac{5}{3}=\dfrac{10}{6}=\dfrac{25}{15}=\dfrac{35}{21}\)
b)\(\dfrac{5}{7}=\dfrac{35}{49};\dfrac{6}{15}=\dfrac{12}{30};\dfrac{4}{5}=\dfrac{16}{20}\)
c) \(6=\dfrac{216}{36}=\dfrac{324}{54}=\dfrac{108}{18}\)
\(6=\dfrac{12}{2}\)
\(9=\dfrac{18}{2}\)
\(4=\dfrac{8}{2}\)
\(12=\dfrac{24}{2}\)
\(11=\dfrac{22}{2}\)
\(10=\dfrac{20}{2}\)
\(13=\dfrac{26}{2}\)
\(23=\dfrac{46}{2}\)
\(30=\dfrac{60}{2}\)
và có mẫu số lần lượt là: 12; 30.
\(\dfrac{18}{6}=18:6\)
\(\dfrac{50}{10}=50:10\)
\(\dfrac{15}{15}=15:15\)
\(\dfrac{12}{24}=12:24\)
\(10=\dfrac{120}{12}\)
\(5=\dfrac{120}{24}\)
\(20=\dfrac{120}{6}\)
\(4=\dfrac{120}{30}\)
\(12=\dfrac{120}{10}\)
\(30=\dfrac{120}{40}\)