Решите дроби

(10 9/14 - 4 1/2 ) + 2/3

( 7 2/9 + 1 7/9 ) ∙ 5/18

( 1 2/5 - 1/4 ) + 3 9/10

(10 9/14 - 4 1/2) + 2/3=
10 27/42 - 4 21/42 + 28/42 = 6 34/42

(7 2/9 + 1 7/9) * 5/18 =
9 * 5/18 = 45/18 = 2 9/18 = 2 1/2

(1 2/5 - 1/4) + 3 9/10 =
1 8/20 - 5/20 + 3 18/20 = 5 1/20