Question

номер 293 под цифрой 1 и 4

Answer 1

Ответ:

Пошаговое объяснение:

$7\frac{7}{9} - 4\frac{1}{12} + 2\frac{3}{4} = 7\frac{7}{9} + 2\frac{9}{12} - 4\frac{1}{12} = 7\frac{7}{9} + \frac{2*12 + 9}{12} - \frac{4*12 + 1}{12} = 7\frac{7}{9} + \frac{33}{12} - \frac{49}{12} = 7\frac{7}{9} - \frac{16}{12} = \frac{7*9 + 7}{9} - \frac{4}{3} = \frac{70}{9} - \frac{12}{9} = \frac{58}{9} = 6\frac{4}{9} .$

$(18 - 10\frac{18}{35}) - (3\frac{9}{28} + 2\frac{3}{20}) = (\frac{630}{35} - \frac{368}{35}) - (\frac{465}{140} + \frac{301}{140}) = \frac{262}{35} - \frac{766}{140} = \frac{1048}{35} - \frac{766}{140} = \frac{282}{140} = \frac{141}{70} .$