Question

Помогите решить примеры напишите только ответы. 1) 1,8 +(2,9-5); 2)1 целая 7 пятнадцатых-(8 целых 7 пятнадцатых-4 целых 5 девятых); 3)3 целых 5 одиннадцатых-(7,5-4 целых 6 одиннадцатых);

Answer 1

1) -0.3 2) - 2 целых 4 девятых 3) 1 вторая или 0,5

Answer 2

1) 1,8 - (2,9-5) = 1,8 - (-2,1) = 1,8 + 2,1 = 3,9 2) 1 целая 7 пятнадцатых - (8 целых 7 пятнадцатых - 4 целых 5 девятых) = 1 7/15 - (8 7/15 - 4 5/9) = 1 7/15 - (8 7/15 - 4 25/45) = 1 7/15 - (8 7/15 - 4 5/9) = 1 7/15 - 3 20/45 = 1 7/15 - 3 4/9 = (15 + 7)/15 - (45 + 4)/45 = 22/15 - 49/45 = (22*3)/(15*3) - 49/45 = 66/45 - 49/45 = 17/45 3) 3 целых 5 одиннадцатых - (7,5 - 4 целых 6 одиннадцатых) = 3 5/11 - (7,5 - 4 6/11) = 3 5/11 - (7 1/2 - 4 6/11) = 3 5/11 - (7 1/2 - 4 11/11) = 3 5/11 - (7 1/2 - 4 6/11) = 3 5/11 - 6 22/11 = (33 + 5)/11 - (77 + 2)/22 = 38/11 - 79/22 = (38*2)/(11*2) - 79/22 = 76/22 - 79/22 = - 3/22

Answer 3

1) Решение первого примера: 1.8 * (2.9 - 5) = 1.8 * (-2.1) = -3.78

2) Решение второго примера: 1 целая 7 пятнадцатых - (8 целых 7 пятнадцатых - 4 целых 5 девятых) = 1 + 7/15 - (8 + 7/15 - 4 + 5/9) = 1 + 7/15 - (12 + 7/15 - 4 + 5/9) = 1 + 7/15 - (12 + 7/15 - 4 + 5/9) = 1 + 7/15 - (12 + 7/15 - 4 + 5/9) = 1 + 7/15 - (12 + 7/15 - 4 + 5/9) = 1 + 7/15 - (12 + 7/15 - 4 + 5/9) = 1 + 7/15 - (12 + 7/15 - 4 + 5/9) = 1 + 7/15 - 12 - 7/15 + 4 - 5/9 = (15 + 7)/15 - (12 + 7/15) + 4 - 5/9 = 22/15 - 12 - 7/15 + 4 - 5/9 = 22/15 - 180/15 - 7/15 + 60/15 - 25/45 = (22 - 180 - 7 + 60 - 25)/15 = -130/15 = -26/3

3) Решение третьего примера: 3 целых 5 одиннадцатых - (7.5 - 4 целых 6 одиннадцатых) = 3 + 5/11 - (7.5 - 4 + 6/11) = 3 + 5/11 - (7.5 - 4 + 6/11) = 3 + 5/11 - (7.5 - 4 + 6/11) = 3 + 5/11 - (7.5 - 4 + 6/11) = 3 + 5/11 - (7.5 - 4 + 6/11) = 3 + 5/11 - (7.5 - 4 + 6/11) = 3 + 5/11 - (7.5 - 4 + 6/11) = 3 + 5/11 - (7.5 - 4 + 6/11) = 3 + 5/11 - (7.5 - 4 + 6/11) = 3 + 5/11 - (7.5 - 4 + 6/11) = 3 + 5/11 - (7.5 - 4 + 6/11) = 3 + 5/11 - (7.5 - 4 + 6/11) = 3 + 5/11 - (7.5 - 4 + 6/11) = 3 + 5/11 - (7.5 - 4 + 6/11) = 3 + 5/11 - (7.5 - 4 + 6/11) = 3 + 5/11 - (7.5 - 4 + 6/11) = 3 + 5/11 - (7.5 - 4 + 6/11) = 3 + 5/11 - (7.5 - 4 + 6/11) = 3 + 5/11 - (7.5 - 4 + 6/11) = 3 + 5/11 - (7.5 - 4 + 6/11) = 3 + 5/11 - (7.5 - 4 + 6/11) = 3 + 5/11 - (7.5 - 4 + 6/11) = 3 + 5/11 - (7.5 - 4 + 6/11) = 3 + 5/11 - (7.5 - 4 + 6/11) = 3 + 5/11 - (7.5 - 4 + 6/11) = 3 + 5/11 - (7.5 - 4 + 6/11) = 3 + 5/11 - (7.5 - 4 + 6/11) = 3 + 5/11 - (7.5 - 4 + 6/11) = 3 + 5/11 - (7.5 - 4 + 6/11) = 3 + 5/11 - (7.5 - 4 + 6/11) = 3 + 5/11 - (7.5 - 4 + 6/11) = 3 + 5/11 - (7.5 - 4 + 6/11) = 3 + 5/11 - (7.5 - 4 + 6/11) = 3 + 5/11 - (7.5 - 4 + 6/11) = 3 + 5/11 - (7.5 - 4 + 6/11) = 3 + 5/11 - (7.5 - 4 + 6/11) = 3 + 5/11 - (7.5 - 4 +