1.10%:2,5+½*1¼ ke pecahan biasa 2.21/6*3%+0,45:3 ke pecahan biasa 3.4/15+31/5-1,2*0,5

[tex]1)10\% \div 2.5 + \frac{1}{2} \times 1 \frac{1}{4} \\ \frac{10}{100} \div \frac{25}{10} + \frac{1}{2} \times \frac{5}{4} \\ \frac{10}{100} \times \frac{10}{25} + \frac{1}{2} \times \frac{5}{4} \\ \frac{2}{50} \times \frac{5}{4} + \frac{1}{2} \\ \frac{1}{20} + \frac{1}{2} \\ \frac{1}{20} + \frac{10}{20} \\ \frac{11}{20} \\ 2) \frac{21}{6} \times 3\% + 0.45 \div 3 \\ \frac{21}{6} \times \frac{3}{100} + \frac{45}{100} \div 3 \\ \frac{21}{200} + \frac{45}{100} \div 3 \\ \frac{21}{200} + \frac{90}{200} \div 3 \\ \frac{110}{200} \div \frac{3}{1} \\ \frac{110}{200} \times \frac{1}{3} \\ \frac{110}{600} \\ \frac{11}{60} \\ 3) \frac{4}{15} + \frac{31}{5} - 1.2 \times 0.5 \\ \frac{4}{15} + \frac{31}{5} - \frac{12}{10} \times \frac{5}{10} \\ \frac{4}{15} + \frac{31}{5} - \frac{6}{10} \\ \frac{8}{30} + \frac{186}{30} - \frac{18}{30} \\ \frac{176}{30} \\ \frac{88}{15} [/tex]