Завдання 1201 - 1300 » 1208-1209

1208. Обчисли: 1) 7,13 · (–10) = –71,3; 2) –0,1 · (–4,42) = 0,442; 3) –1,8 · (–100) = 180; 4) 12,7 · (–0,01) = –0,127. 1209. Знайди значення виразу: 1) (–2,1)2 = –2,1 · (–2,1) = 4,41; 2) (–4)3 = –4 · (–4) · (–4) = –64; 3) (– 3/7)2 = – 3/7 · (–3/7) = 9/49; 4) (–0,1)3 = –0,1 · (–0,1) · (–0,1) = –0,001; 5) (–1)2 = –1 · (–1) = 1; 6) (–1)3 = –1 · (–1) · (–1) = –1.