А)
1) 1 5/6 - 4 4/9 = 1 15/18 - 4 8/18 = 1 15/18 - 3 26/18 = - 2 11/18
2) - 2/3 + 8,5 = - 2/3 + 8 1/2 = - 4/6 + 8 3/6 = - 4/6 + 7 9/6 = 7 5/6
3) - 2 11/18 : 7 5/6 = - 47/18 : 47/6 = - 6/18 = - 1/3
Ответ ( - 1/3 )
Б)
1) 3 2/7 + 5 3/14 = 3 4/14 + 5 3/14 = 8 7/14 = 8 1/2
2) 5/17 • 8 1/2 = 5/17 • 17/2 = 5/2 = 2 1/2
3) 6 2/3 - 2 1/2 = 6 4/6 - 2 3/6 = 4 1/6
Ответ 4 1/6