Question

ПРОШУУУУ РЕШИТЕЕЕЕ

ДАМ 20 БАЛОВ!!!!!

ПРОШУ ВАС((!!!!!!


ПРОШУУУУ ДАМ ВСЕ БАЛЫ!!!!! ПРОШУУ!
ТОЛЬКО ПРАВИЛЬНО (((!!!!​

Answer 1

Відповідь:

1) -1.74 : (-7) = 1.47 : 7 = 0.21

2) $-5\frac{5}{6} : \frac{14}{15} = -\frac{35}{6} * \frac{15}{14} = -\frac{5}{2} *\frac{5}{2} = -\frac{25}{4} = -6\frac{1}{4}$ = - 6.25

3) $-6.45*(-\frac{1}{5}) = -\frac{129}{20} * (-\frac{1}{5}) = \frac{129}{20} * \frac{1}{5} = \frac{129}{100} = 1\frac{29}{100} = 1.29$

4) $-\frac{5}{12} :(-3\frac{1}{6}): 1\frac{1}{19} = -\frac{5}{12} :(-\frac{19}{6}): \frac{20}{19} = \frac{5}{12} *\frac{6}{19}* \frac{19}{20} = \frac{1}{2} *\frac{1}{4} = \frac{1}{8} = 0.125$

5)

$\frac{2}{5} *(1.7 - 4\frac{1}{4}) - 0.98= \frac{2}{5} *(\frac{17}{10} - \frac{17}{4}) -\frac{49}{50} = \frac{2}{5} *(-\frac{51}{20}) -\frac{49}{50} = -\frac{1}{5} *\frac{51}{10} -\frac{49}{50} = -\frac{51}{50} -\frac{49}{50} = -2$