1. 5 6/7 + 3 5/21 = 5 18/21 + 3 5/21 = 9 2/21
2. 9 2/21 * 2/10 = 191/21 * 2/10 = 382/210 = 191/105
ответ: 191/105
1. 5 6/7 + 3 5/21 = 5 18/21 + 3 5/21 = 9 2/21
2. 9 2/21 * 2/10 = 191/21 * 2/10 = 382/210 = 191/105
ответ: 191/105