Завдання 1301 - 1402 » 1336-1337

1336. Обчисли: 1) 11/4 : (–55/7) = – (5 ∙ 7)/(4 ∙ 40) = – 7/32; 2) –31/9 : (–21/3) = (28 ∙ 3)/(9 ∙ 7) = 4/3; 3) –76/7 : (–93/7) = (55 ∙ 7)/(7 ∙ 66) = 5/6; 4) 15/9 : (–213/18) = – (14 ∙ 18)/(9 ∙ 49) = – 4/7. 1337. Обчисли частку: 1) –21/8 : 41/4 = – (17 ∙ 4)/(8 ∙ 17) = – 1/2; 2) 18/27 : (–15/9) = – (35 ∙ 9)/(27 ∙ 14) = – 5/6; 3) –112/5 : (–34/5) = (57 ∙ 5)/(5 ∙ 19) = 3; 4) –42/7 : 119/21 = – (30 ∙ 21)/(7 ∙ 40) = – 9/4.