Question

А) 5/6b+3/10b-7/15b;Б)3целых5/6y-2целых5/12y+1 целая1/3y

Answer 1

$frac{5}{6}b+ frac{3}{10} b - frac{7}{15} b = ( frac{5}{6} + frac{3}{10} + frac{7}{15} )*b = frac{50 + 18 + 28}{60} b = \ \= frac{96}{60}b = frac{8}{5} b = 1 frac{3}{5}b=1.6b$

$3 frac{5}{6} y - 2 frac{5}{12} y+ 1 frac{1}{3}y= ( 3 frac{5}{6} - 2 frac{5}{12} + 1 frac{1}{3})*y= \ \ =(3 frac{10}{12} - 2 frac{5}{12} + 1 frac{4}{12})*y= 2 frac{9}{12} y = 2 frac{3}{4} y= 2.75y$