Помогите плиз 217 219 220 223 и 224 их решите а ост не надо
Ответы
Ответ:
Пошаговое объяснение:
217. а) 3 2/7 = 23/7; 5 7/11 = 62/11; 2 11/36 = 83/36
б) 4 1/3: 1 1/3 = 4/3; 5 7/15: 1 7/15 = 22/15; 3 8/45: 1 8/45 = 53/45
в) 5 и 12 со знаменателем 8: 40/8 и 96/8
219. а) 6 5/8 + 2/8 = 6 7/8 в) 4 + 2/3 = 4 2/3 д) 4 3/8 + 2 5/8 = 6 8/8 = 7
б) 2 2/9+3 5/9=5 7/9 г) 3 5/7+8=11 5/7 е) 2 7/13+3 8/13 = 5 15/13=6 2/13
220. а) 8 9/11 - 3 5/11 = 5 4/11
б) 6 5/8 - 4 = 2 5/8
в) 9 - 5/6 = 8 6/6 - 5/6 = 8 1/6
г) 9 - 3 5/8 = 8 8/8 - 3 5/8 = 5 3/8
д) 8 2/7 - 3 5/7 = 7 9/7 - 3 5/7 = 4 4/7
е) 8 3/8 - 5 3/8 = 3
223. а) (8-4 3/11)+2 8/11=(7 11/11-4 3/11)+2 8/11=3 8/11+2 8/11=5 16/11=6 5/11
б) 11 1/7-(5 4/7+3 6/7) = 11 1/7 - 8 10/7 = 10 8/7 - 9 3/7 = 1 5/7
224. (х - 1 8/9) + 3 7/9 = 4 4/9
х - 1 8/9 + 3 7/9 = 4 4/9
х = 4 4/9 + 1 8/9 - 3 7/9
х = 5 12/9 - 3 7/9
х = 2 5/9