65. найдите значение выражения:
1) 9 1/4 *8-1 2/3*5 1/2- 2 4/5*2 11/12
2)1 1/22*3 2/3-(2 5/6+3 5/6*7/23)*3/5

1) 9 1/4 *8-1 2/3*5 1/2- 2 4/5*2 11/12 = 56 2/3

1) 37/4 • 8/1 = 37/1 • 2/1 = 74

2) 5/3 • 11/2 = 55/6 = 9 1/6

3) 14/5 • 35/12 = 7/1 • 7/6 = 49/6 = 8 1/6

4) 74 - 9 1/6 - 8 1/6 = 73 6/6 - 9 1/6 - 8 1/6 = 64 5/6 - 8 1/6 = 56 4/6 = 56 2/3

2)1 1/22*3 2/3-(2 5/6+3 5/6*7/23)*3/5 = 1 23/30

1) 3 5/6 • 7/23 = 23/6 • 7/23 = 7/6 = 1 1/6

2) 2 5/6 + 1 1/6 = 3 6/6 = 4

3) 1 1/22 • 3 2/3 = 23/22 • 11/3 = 23/2 • 1/3 = 23/6 = 3 5/6

4) 4/1 • 3/5 = 12/5 = 2 2/5 = 2,4

5) 3 5/6 - 2 2/5 = 3 25/30 - 2 12/30 = 1 23/30