Номер 1177
1) 0,3 + (4,7 – 5 1/9) = 0,3 + 4,7 – 5 1/9 = 5 – 5 1/9 = –1/9
2) –(4 1/2 – 2 1/9) – 3 1/9 = –4 1/2 + 2 1/9 – 3 1/9 = –4 1/2 – 1 = –5 1/2
3) –(1,76 + 4 1/2) + (1,76 – 5 2/9) = –1,76 – 4 1/2 + 1,76 – 5 2/9 = –(4 9/18 + 5 2/18) = –9 13/18
4) 2 5/14 – (7 2/11 – 3 9/14) = 2 5/14 – 7 2/11 + 3 9/14 = 6 – 7 2/11 = –1 2/11
5) –(2 1/3 – 3 2/9) + 4 1/18 = –2 1/3 + 3 2/9 + 4 1/18 = –2 6/18 + 3 4/18 + 4 1/18 = 7 5/18 – 2 6/18 = 6 23/18 – 2 6/18 = 4 17/18
6) (1,8 – 2 2/3) – (1,2 – 4 5/6) = 1,8 – 2 2/3 – 1,2 + 4 5/6 = 0,6 + 4 5/6 – 2 4/6 = 6/10 + 2 1/6 = 3/5 + 2 1/6 = 18/30 + 2 5/30 = 2 23/30