Question

вычислите:1)- 3/5 - 1/4 2)- 1/3 - 2/3 3) - 3/7 - 4/7 4) - 1/4 - 5/7 5) - 5/6 - 1/3 6) - 1/8 - 3/4 - 7) 4 3/8 - 2 1/4 8) 6 1/2 - 3 5/7 9) - 9 - 3 5/9

Answer 1

1) -0,85 или - 17/20
2) - 1
3)  - 1
4) -27/28 или - 0,96
5) -7/6 или 1 1/6
6) -7/8
7) 17/8 или 2 1/8 или 2,125
8) приблизительно 2, 8 или 2 11/14
9) -12 5/9 или приблизительно -12,6

Answer 2

Давайте вычислим данные выражения:

1. -3/5 - 1/4 = (-12/20) - (5/20) = -17/20

2. -1/3 - 2/3 = (-1/3) - (2/3) = -3/3 = -1

3. -3/7 - 4/7 = (-3/7) - (4/7) = -7/7 = -1

4. -1/4 - 5/7 = (-7/28) - (20/28) = -27/28

5. -5/6 - 1/3 = (-5/6) - (2/6) = -7/6

6. -1/8 - 3/4 = (-1/8) - (6/8) = -7/8

7. 4 3/8 - 2 1/4 = 4 + 3/8 - 2 - 1/4 = 2 7/8 - 2 1/4 = 2 + 7/8 - 2 - 1/4 = 2 + 7/8 - 8/8 - 1/4 = 2 + 7/8 - 9/8 = 1 7/8

8. 6 1/2 - 3 5/7 = 6 - 3 + 1/2 - 5/7 = 3 + 1/2 - 5/7 = 3 + 7/14 - 10/14 = 3 - 3/14 = 2 11/14

9. -9 - 3 5/9 = -9 - 32/9 = -81/9 - 32/9 = -(81+32)/9 = -113/9

Итак, результаты вычислений:

1. -3/5 - 1/4 = -17/20
2. -1/3 - 2/3 = -1
3. -3/7 - 4/7 = -1
4. -1/4 - 5/7 = -27/28
5. -5/6 - 1/3 = -7/6
6. -1/8 - 3/4 = -7/8
7. 4 3/8 - 2 1/4 = 1 7/8
8. 6 1/2 - 3 5/7 = 2 11/14
9. -9 - 3 5/9 = -113/9