Question

Допоможіть будь ласка

Answer 1

Ответ:

1)

$\frac{207}{28}$

2)

$\frac{445}{36}$

Пошаговое объяснение:

1)

$6 \frac{2}{7} + 3 \frac{13}{14} - 2 \frac{3}{28} = \\ = \frac{44}{7} + \frac{55}{14} - \frac{59}{28} = \\ = \frac{4 \times 44}{4 \times 7} + \frac{2 \times 55}{2 \times 14} - \frac{59}{28} = \\ = \frac{156}{28} + \frac{110}{28} - \frac{59}{28} = \\ = \frac{156 + 110 - 59}{28} = \\ = \frac{207}{28}$

2)

$(4 \frac{21}{24} - 1 \frac{7}{12} ) + (6 \frac{23}{24} + 2 \frac{1}{36} ) = \\ = ( \frac{117}{24} - \frac{19}{12} ) + ( \frac{169}{24} + \frac{73}{36} ) = \\ = \frac{117}{24} - \frac{19}{12} + \frac{169}{24} + \frac{73}{36} = \\ = \frac{3 \times 117}{3 \times 24} - \frac{6 \times 19}{6 \times 12} + \frac{3 \times 169}{3 \times 24} + \frac{2 \times 73}{2 \times 36} = \\ = \frac{351}{72} - \frac{114}{72} + \frac{507}{72} + \frac{146}{72} = \\ = \frac{351 - 114 + 507 + 146}{72} = \\ = \frac{890}{72} = \\ = \frac{2 \times 445}{2 \times 36} = \frac{445}{36}$