Вправи 201 - 300 » 222

Скоротіть: 1) (4 • 5)/(25 • 6) = (2 • 1)/(5 • 3) = 2/15; 2) (8 • 13)/(39 • 2) = (4 • 1)/(3 • 1) = 4/3; 3) (3 • 38)/(19 • 27) = (1 • 2)/(1 • 9) = 2/9; 4) (2 • 3 • 4 • 5)/(4 • 5 • 6 • 7) = 6/(6 • 7) = 1/7; 5) (6 • 7 • 8 • 9 • 10)/(7 • 9 • 11 • 12) = (2 • 2 • 10)/(11 • 1) = 40/11; 6) (3 • 16 - 8 • 3)/27 = (3 • 8)/(3 • 9) = 8/9; 7) (9 • 13 + 9 • 2)/(54 • 13) = (9 • 15)/(54 • 13) = 5/(2 • 13) = 5/26; 8) (27 • 15 - 7 • 27)/(9 • 15 - 9 • 11) = (27 • 8)/(9 • 4) = 3 ∙ 2 = 6; 9) (24 • 2 + 6 • 24)/(60 • 7- 5 • 60) = (24 • 8)/(60 • 2) = 24/15 = 8/5.