Вправи 1201 - 1300 » 1268 (7-8)

7) (-0,4 (-6,3 ∶ 3,15 + 5/6 • 0,9))/(-48 - 2/7 • (-91)) = (-0,4 • (-2 + 5/6 • 9/10))/(-48 + 26) = (-0,4 • (-2 + 0,75))/(-22) = (-0,4 • (-1,25))/(-22) = –0,5/22 = –1/44. 8) (–13,6 + 5,1) ∙ 13/17 + (27/23 – 145/46) : 17/23 = (–8,5) ∙ 13/17 + (160/46 – 145/46) ∙ 23/30 = (–17/2) ∙ 20/17 + 15/46 ∙ 23/30 = –93/4.