Завдання 1201 - 1300 » 1282-1283

1282. Обчисліть: 1) –4 ∙ (–25) = 100; 2) –12 ∙ (–100) = 1200; 3) –0,04 ∙ (–2) = 0,08; 4) –1,3 ∙ (–0,1) = 0,13; 5) –65 ∙ (–12) = 780; 6) –0,01 ∙ (–130) = 1,3. 1283. Обчисліть: 1) –2 ∙ (–44) = 88; 2) –0,8 ∙ (–5) = 4; 3) –20 ∙ (–39) = 780; 4) –6/7 ∙ (–7/18) = 1/3.