Question

Решите пж ,дам 35 баллов

Answer 1

$bf NUMBER : 1.$

$a)12 frac{2}{13} - (8 frac{2}{13} + 1 frac{5}{13} ) = 12 frac{2}{13} - (8 + 1) + ( frac{2}{13} + frac{5}{13} ) = 12 frac{2}{13} - (9 + frac{7}{13} ) = 12 frac{2}{13} - 9 frac{7}{13} = frac{158}{13} - frac{124}{13} = frac{34}{13} = 2 frac{8}{13}$

$b)(7 frac{5}{14} + 2 frac{9}{14} ) - 3 frac{5}{8} = (7 + 2) + ( frac{5}{14} + frac{9}{14} ) - 3 frac{5}{8} = 9 + frac{14}{14} - 3 frac{5}{8} = 10 - 3 frac{5}{8} = 9 frac{8}{8} - 3 frac{5}{8} = frac{80}{8} - frac{29}{8} = frac{51}{8} = 6 frac{3}{8}$

$bf NUMBER : 2.$

$(3 frac{9}{13} + x) - 4 frac{9}{13} = 1 frac{7}{13}$

$3 frac{9}{13} + x - 4 frac{9}{13} = 1 frac{7}{13}$

$frac{48}{13} + x - frac{61}{13} = 1 frac{7}{13}$

$- frac{13}{13} + x = 1 frac{7}{13}$

$x = 1 frac{7}{13} + frac{13}{13}$

$x = frac{20}{13} + frac{13}{13}$

$x = frac{33}{13} = 2 frac{7}{13}$

$bf NUMBER : 3.$

Вместо "*" можно подставить числа от 1 до 6.

$frac{378}{319} : frac{378}{329} : frac{378}{339} : frac{378}{349} : frac{378}{359} : frac{378}{369}$