Вправи для повторення розділу 3 » 83

Обчисли, обираючи зручний порядок дій: 1) 7/23 ∙ (–22/3) ∙ (–92) ∙ 1,2 = 7/23 ∙ (–92) ∙ (–8/3) ∙ 6/5 = 7 ∙ (–4) ∙ (–16/5) = 28 ∙ 16/5 = 28 ∙ 31/5 = 28 ∙ 3,2 = 89,6; 2) –7/16 ∙ 9/25 ∙ (–32) ∙ (–7,5) = –7/16 ∙ (–32) ∙ 9/25 ∙ (–71/2) = 7 ∙ 2 ∙ 9/25 ∙ (–15/2) = 14 ∙ (–(9 • 3)/(5 • 2)) = –14 ∙ 27/10 = –14 ∙ 27/10 = –14 ∙ 2,7 = –37,8.