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Обчисліть значення числового виразу: 1) 147/15 – 33/23 ∙ 23/27 – 11/5 ∙ 1/6 = 147/15 – 72/23 ∙ 23/27 – 6/5 ∙ 1/6 = 147/5 – 8/3 – 1/5 = = 147/15 – 22^(\5)/3 – 1^(\3)/5 = 12(7 - 10 - 3)/15 = 11(15 + 7 - 10 - 3)/15 = 119/15 = 113/5; 2) (58/9 : 117/36 + 11/4) ∙ 5/21 = (53/9 : 53/36 + 11/4) ∙ 5/21 = (53/9 ∙ 36/53 + 11/4) ∙ 5/21 = = 51/4 ∙ 5/21 = 21/4 ∙ 5/21 = 11/4; 3) (–3,25 – 2,75): (–0,6) + 0,8 ∙ (–7) = –6 : (–0,6) – 5,6 = 10 – 5,6 = = 4,4; 4) (–13^(\3)/8 – 25^(\2)/12) : 55/12 = –3(9+10)/24 : 65/12 = –319/24 ∙ 12/65 = –91/24 ∙ 12/65 = –7/10.