Question

Calculează: 1,2+1,(3) 20:0,14.2​

Answer 1

Răspuns:

$1.2 + 1.(3) + 20 \div 0.14 \times 2 = \\ \frac{12}{10} + \frac{13 - 1}{9} + 20 \div \frac{14}{100} \times 2 = \\ \frac{12}{10} + \frac{12}{9} + 20 \times \frac{100}{14} \times 2 = \\ \frac{12}{10} + \frac{12}{9} + 20 \times \frac{50}{7} \times 2 = \\ \frac{108 + 120}{90} + \frac{1000}{7} \times 2 = \\ \frac{228}{90} + \frac{500}{7} = \\ \frac{38}{15} + \frac{500}{7} = \\ \frac{266 + 7500}{105} = \\ = \frac{7766}{105}$