Question

С РЕШЕНИЕМ СРОЧНО НАДО!!!!!!ПОМОГИТЕ
Мне

Answer 1

1 пример.
1)
$6 \frac{3}{4} \div 4 \frac{1}{2} = \frac{27}{4} \div \frac{9}{2} = \frac{27 \times 2}{4 \times 9} = \frac{3}{2}$
2)
$\frac{3}{2} + 2 \frac{5}{7} = \frac{3}{2} + \frac{19}{7} = \frac{21 + 38}{14} = \frac{59}{14}$
3)
$\frac{59}{14} \div 8 \frac{3}{7} = \frac{59}{14} \div \frac{59}{7} = \frac{59 \times 7}{14 \times 59} = \frac{1}{2}$
4)
$\frac{1}{2} - \frac{2}{5} = \frac{5 - 4}{10} = \frac{1}{10} = 0.1$
ОТВЕТ: 1/10= 0,1.

2 пример.

1)
$1 \frac{3}{7} + 4 \frac{5}{21} = \frac{10}{7} + \frac{89}{21} = \frac{30 + 89}{21} = \frac{119}{21}$
2)
$\frac{119}{21} - 5 \frac{1}{4} = \frac{119}{21} - \frac{21}{4} = \\ = \frac{476 - 441}{84} = \frac{35}{84}$
3)
$\frac{35}{84} \times 1 \frac{5}{7} = \frac{35 \times 12}{84 \times 7} = \frac{5}{7}$
4)
$8 \frac{1}{4} \div 2 \frac{5}{8} = \frac{33}{4} \div \frac{21}{8} = \frac{33 \times 8}{4 \times 21} = \frac{22}{7}$
$\frac{5}{7} + \frac{22}{7} = \frac{27}{7} = 3\frac{6}{7}$
ОТВЕТ: 3 целых и 6/7