Частина 2 — Вправи: 1378

1378. Обчисліть:

1) (–7,7 – 7,3) ∙ (–725 : (–6,3) + (–2,6) : 145) = –15 ∙ (725 ∙ 1063 – 135 ∙ 59) = –15 ∙ (245 – 139) = –15 ∙ (–6345) = 21;

2) (35 + 5,6 : 1,4) : (–17 ∙ (–2,1) + (–1,5) : (–0,75)) = (35 + 4) : (17 ∙ 2110 + 2) = 235 : 2310 = 235 ∙ 1023 = 2;

3) –3,2 : (–0,8) + (–1,4) : 12 : (1 – 310 : (–1,8)) = 4 – 75 ∙ 2 : (1 + 310 ∙ 59) = 4 – 75 ∙ 2 : (1 + 16) = 4 – 75 ∙ 2 ∙ 67 = 4 – 125 = 85 = 135.