Question

Calculați:
0,8 ∙ (2/3+ 0,75) + 3: (7,5 − 3) −1/6

Answer 1

Răspuns:

$\frac{1}{5}$

Explicație pas cu pas:

$\frac{8}{10} *(\frac{2}{3}+\frac{75}{100} )+3:(\frac{75}{10} -3)-\frac{16}{10} \\\frac{8}{10} *\frac{425}{300}+3:(\frac{75-30}{10} )-\frac{16}{10} \\\frac{8}{10} *\frac{425}{300}+3:\frac{45}{10} -\frac{16}{10} \\\frac{34}{30} +\frac{3*10}{45} -\frac{16}{10} \\\frac{34}{30} +\frac{30}{45} -\frac{16}{10} \\\frac{17}{15} +\frac{30}{45} -\frac{8}{5} \\\frac{51+30-72}{45} \\\\\frac{9}{45} = \frac{1}{5}$