Завдання 1101 - 1200 » 1178

Розкрий дужки й обчисли: 1) 0,7 + (5,3 – 42/3) = 0,7 + 5,3 – 42/3 = 53/3 – 42/3 = 11/3; 2) –(45/12 – 25/6) + 15/12 – 45/12 + 25/6 + 15/12 = 25/6 – 3 = –(26/6 – 25/6) = –1/6; 3) (1,8 – 41/2) – (51/2 + 1,8) = 1,8 – 41/2 – 51/2 –1,8 = –10; 4) 32/7 – (41/3 – 65/7) = 32/7 – 41/3 + 65/7 = 10 – 41/3 – 93/3 – 41/3 = 52/3; 5) –(55/6 – 22/3) + 31/9 = –55/6 + 22/3 + 31/9 = 5(6+1)/9 – 55/6 = 7/9 – 5/6 = 14/18 – 15/18 = –1/18; 6) –(1,9 – 21/3) + (32/3 – 1,1) = –1,9 + 21/3 + 33/3 – 1,1 = 6 – 3 = 3.