Завдання 1301 - 1401 » 1377

Обчисліть: 1) –5 ∙ 5,805 : (–5/8) + 11,83 : (–7) = 5 ∙ 5,805 ∙ 8/5 – 1,69 = 46,44 – 1,69 = 44,75; 2) –6,4 : (–22/15) – (–5,2) : (–37/15) + (–5,4) : (–3/5) = 32/5 ∙ 15/32 – 26/5 ∙ 15/52 + 27/5 ∙ 5/3 = 3 – 1,5 + 9 = 10,5; 3) –18,2 : (–82/3) + (–81/2) : (–1,7) + 35/9 : (–0,16) ∙ 4,14 : 23 = 91/5 ∙ 3/26 + 17/2 ∙ 10/17 – 32/9 ∙ 25/4 ∙ 207/50 ∙ 1/23 = 273/130 + 5 – 8 ∙ 23/2 ∙ 1/23 = 2,1 + 5 – 4 = 3,1.