Завдання 1101 - 1200 » 1177

Розкрий дужки і знайди значення виразу: 1) 0,3 + (4,7 – 51/9) = 0,3 + 4,7 – 51/9 = 5 – 51/9 = – 1/9; 2) –(41/2 – 21/9) – 31/9 = 41/2 + 21/9 – 31/9 = –41/2 – 1 = –51/2; 3) –(1,76 + 41/2) + (1,76 – 52/9) = –1,76 – 41/2 + 1,76 – 52/9 = –9(9+4)/18 = –913/18; 4) 25/14 – (72/11 – 39/14) = 25/14 – 72/11 + 39/14 = 6 – 72/11 = –12/11; 5) –(21/3 – 32/9) + 41/18 = –21/3 + 32/9 + 41/18 = –26/18 + 34/18 + 41/18 = 623/18 – 26/18 = 417/18; 6) (1,8 – 22/3) – (1,2 – 45/6) = 1,8 – 22/3 – 1,2 + 45/6 = 0,6 + 45/6 – 24/6 = 3/5 21/6 = 2(18+5)/30 = 223/30.