a: \(17+\dfrac{61}{100}=17.61\)
\(31+\dfrac{501}{1000}=31.501\)
\(30+\dfrac{32}{100}=30.32\)
\(24+\dfrac{7}{10}=24.7\)
b: \(5+\dfrac{3}{10}=5.3\)
\(51+\dfrac{62}{100}=51.62\)
\(90+\dfrac{8}{100}=90.08\)
\(4+\dfrac{3}{1000}=4.003\)
\(17\dfrac{61}{100}=\dfrac{1761}{100}=17,61\)
\(31\dfrac{501}{1000}=\dfrac{31501}{1000}=31,501\)
\(30\dfrac{32}{100}=\dfrac{3032}{100}=30,32\)
\(24\dfrac{7}{10}=\dfrac{247}{10}=24,7\)
\(18\dfrac{27}{10000}=\dfrac{180027}{10000}=18,0027\)
\(----------------\)
\(5\dfrac{3}{10}=\dfrac{53}{10}=5,3\)
\(51\dfrac{62}{100}\times90\dfrac{8}{100}=\dfrac{5162}{100}\times\dfrac{9008}{100}=51,62\times90,08=4649,9296\)
\(4\dfrac{3}{1000}=\dfrac{4003}{1000}=4,003\)
\(35\dfrac{28}{100}=\dfrac{3528}{100}=35,28\)
4 và 5