Завдання 1301 - 1401 » 1304

Обчисліть, скориставшись розподільним законом: 1) (5/7 + 2) ∙ (–7) = (5/7 + 14/7) ∙ (–7) = 19/7 ∙ (–7) = –19; 2) (–4,9 – 1/2) ∙ 2 = (–4,9 – 0,5) ∙ 2 = –5,4 ∙ 2 = –10,8; 3) 15 ∙ (1/5 – 2/3) = 15 ∙ (3/15 – 10/15) = 15 ∙ (–7/15) = –7; 4) 1000 ∙ (–0,1 + 0,01 – 0,001) = 1000 ∙ (–0,091) = –91; 5) (1/6 – 1/3) ∙ (–18) = (1/6 – 2/6) ∙ (–18) = (–1/6) ∙ (–18) = 3; 6) –24 ∙ (5/12 – 3/4 + 5/6) = –24 ∙ (5/12 – 9/12 + 10/12) = –24 ∙ 1/2 = –12.