Question

Помогите,пожалуйста!

Answer 1

1)
▪а)

$4 frac{5}{13} + 8 frac{7}{13} + 11 frac{8}{13} + 14 frac{8}{15} = 23 frac{5 + 7 + 8}{13} + 14 frac{8}{15} = 23 frac{20}{13} + 14 frac{8}{15} = 24 frac{7}{13} + 14 frac{8}{15} = 38 frac{7 times 15 + 8 times 13}{195} = 38 frac{105 + 104}{195} = 38 frac{209}{195} = 39 frac{14}{195}$
▪б)

$- 4.83 + 3.99 + 2.83 = ( - 4.83 + 2.83) + 3.99 = - 2 + 3.99 = 1.99$
▪в)

$( - frac{5}{14} ) times ( frac{37}{11} ) times ( - frac{11}{37} ) times (- 28) = - frac{5 times ( - 28)}{14} times frac{37 times ( - 11)}{11 times 37} = 5 times 2 times ( - 1) = - 10$

2)
▪а)
$(7 + frac{5}{12} ) times 12 = 7 times 12 + frac{5 times 12}{12} = 84 + 5 = 89$

▪б)
$9 times 7 frac{4}{9} = 9 times 7 + frac{9 times 4}{9} = 63 + 4 = 67$