Question

Найти значение выражения:
1)1 4/15+6 13/45-7/12;
2)10 5/28+ (6/7-3/14);
3)8 7/12-5/18+1 3/4-2 1/6

Answer 1

1)
$1 frac{4}{15} + 6 frac{13}{45} - frac{7}{12} = \ \ = 1 frac{12}{45} + 6 frac{13}{45} - frac{7}{12} = \ \ = 7 frac{5}{9} - frac{7}{12} = \ \ = 7 frac{20}{36} - frac{21}{36} = 6 frac{56}{36} - frac{21}{36} = \ \ = 6 frac{35}{36}$

2)
$10 frac{5}{28} + ( frac{12}{14} - frac{3}{14} ) = \ \ = 10 frac{5}{28} + frac{18}{28} = \ \ = 10 frac{23}{28}$

3)
$8 frac{21}{36} - frac{10}{36} + 1 frac{27}{36} - 2 frac{6}{36} = \ \ = 8 frac{11}{36} + 1 frac{27}{36} - 2 frac{6}{36} = \ \ = 9 frac{38}{36} - 2 frac{6}{36} = 7 frac{32}{36} = 7 frac{8}{9}$