Question

SOS
tem prazo sososososososos​

Answer 1

Explicação passo-a-passo:

$a) \frac{2}{5} + 0.15 = \frac{2}{5} + \frac{15}{100} = \frac{2}{5} + \frac{3}{20} = \\ \\ \frac{(4 \times 2) + 3}{20} = \frac{8 + 3}{20} = \frac{11}{20} = 0.55 \\ \\ b) \frac{3}{4} + 11\% = \frac{3}{4} + \frac{11}{100} = \frac{(25 \times 3) + 11}{100} = \\ \\ \frac{75 + 11}{100} = \frac{86}{100} = \frac{43}{50} = 0.86 \\ \\ c)0.14 + 18\% = \frac{14}{100} + \frac{18}{100} = \frac{32}{100} = \frac{8}{25} \\ \\ = 0.32 \\ \\ d) \frac{1}{2} + 0.13 + 21\% = \frac{1}{2} + \frac{13}{100} + \frac{21}{100} = \\ \\ \frac{50 + 13 + 21}{100} = \frac{84}{100} = \frac{21}{25} = 0.84$