Hai số thập phân có tổng là $135,212,3$ \frac{9}{5}:\frac{17}{15}+\frac{8}{5}:\frac{17}{15}$$ x$$ x\times 1,8=72;$$ x\times 0,34=1,19\times 1,02;$$ x\times 1,36=4,76\times 4,08.$$ 17,55:3,9;$$ 0,603:0,09;$$ 0,3068:0,26;$$ 98,156:4,63.$$ 30\%$$ 72$$ 420$$ 10,5\%$$ 30\%$$ 97$$ 6000000$$ 15\%$$ \frac{2}{3}$$ \frac{5}{9}$$ \frac{2}{3}$$ \frac{8}{9}$$ \frac{1212}{1515}$$ \frac{1212}{3535}$$ \frac{1212}{6363}$$ \frac{1212}{9999}$$ \frac{\mathrm{(x\; +\; 1)\; +\; (x\; +\; 2)\; +.........+\; (x\; +\; 211)\; =\; 23632}}{}$$ 2\frac{1}{2}cm$$ \mathrm{\backslash (2\backslash frac\{1\}\{2\}\backslash )}cm=2,5cm$\frac{34}{100}=0,34\frac{3}{10}=\dots \frac{54}{100}=\dots \frac{34}{1000}=\dots 6\frac{3}{10}=\dots 35\frac{54}{100}=\dots 187\frac{34}{1000}=\dots 2,5\times 74,18\times 50,256\times 86,8\times 15$ \frac{2}{5}$$ \frac{1}{3}$$ \frac{3}{4}$$