Question

[1,2+1,(3) ×2 supra 30] : 0,14×2

Answer 1

$(1.2 + 1.(3) \times \frac{2}{30} ) \div 0.14 \times 2 = \\ \\ = ( \frac{12}{10} + 1 \frac{3}{9} \times \frac{2}{30} ) \div \frac{14}{100} \times 2 = \\ \\ = ( \frac{12}{10} + \frac{12}{9} \times \frac{2}{30} ) \div \frac{14}{50} = \\ \\ = ( \frac{12}{10} + \frac{4}{3} \times \frac{2}{30} ) \div \frac{14}{50} = \\ \\ = ( \frac{12}{10} + \frac{4}{45} ) \div \frac{14}{50} = \\ \\ = ( \frac{108 + 8}{90} ) \div \frac{14}{50} = \\ \\ = \frac{116}{90} \times \frac{50}{14} = \\ \\ = \frac{290}{63}$