Вправи 1201 - 1300 » 1268 (3-4)

3) (55/28 – 51/3 ∙ 1,25 – 116/21) : (–1,5) = (55/28 – 16/3 ∙ 5/4 – 116/21) : (–1,5) = (55/28 – 62/3 – 116/21) : (–1,5) = (55/28 – 614/21 – 116/21) : (–1,5) = (55/28 – 89/21) : (–1,5) = (55/28 – 83/7) : (–1,5) = (55/28 – 812/28) : (–1,5) = –37/28 ∙ (–2/3) = 31/4 ∙ 2/3 = 13/4 ∙ 2/3 = 13/6 = 21/6. 4) (–31/3 ∙ 1,9 + 19,5 : 41/3) : (0,16 – 62/75) = (–10/3 ∙ 19/10 + 39/2 ∙ 3/13) : (4/25 – 62/75) = (–19/3 + 9/2) : (12/75 – 62/75) = (–38/6 + 27/6) : (–50/75) = (–11/6) ∙ (–3/2) = 11/4 = 23/4.