Question

Вычислите 1/4+3/5, 9/11-2/5 , 13/16-9/32, 3/28+5/14, 14/15-7/10, 3/8+1/6, 9/25-7/20,37/42-17/24,11/24-3/6,9/16+7/24-3/8,1/3-1/6+1/4,2/5+4/15-5/9

Answer 1

Пошаговое объяснение:

1/4+3/5=17/20=0,85

9/11-2/5=23/55

13/16-9/32=17/32

3/28+5/14=13/28

14/15-7/10=7/30

3/8+1/6=13/24

9/25-7/20=1/100=0,01

37/42-17/24=29/168

11/24-3/6=-1/24

9/16+7/24-3/8=41/48-3/8=-121/48

1/3-1/6+1/4=5/12

2/5+4/15-5/9=1/9

Answer 2

Ответ:

1. 17/20

2. 23/55

3. 17/32

4. 13/28

5. 7/30

6. 13/24

7. 1/100

8.  29/168

9. 1/24

10. 23/48

11. 5/12

12. 1/9

Answer 3

Давайте посчитаем каждое из этих выражений:

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

2. 9/11 - 2/5: (9/11) - (2/5) = (45/55) - (22/55) = (45 - 22) / 55 = 23/55

3. 13/16 - 9/32: (13/16) - (9/32) = (26/32) - (9/32) = (26 - 9) / 32 = 17/32

4. 3/28 + 5/14: (3/28) + (5/14) = (3/28) + (10/28) = (3 + 10) / 28 = 13/28

5. 14/15 - 7/10: (14/15) - (7/10) = (28/30) - (21/30) = (28 - 21) / 30 = 7/30

6. 3/8 + 1/6: (3/8) + (1/6) = (9/24) + (4/24) = (9 + 4) / 24 = 13/24

7. 9/25 - 7/20: (9/25) - (7/20) = (36/100) - (35/100) = (36 - 35) / 100 = 1/100

8. 37/42 - 17/24: (37/42) - (17/24) = (88/84) - (49/84) = (88 - 49) / 84 = 39/84 (после сокращения дроби на 3)

9. 11/24 - 3/6: (11/24) - (3/6) = (11/24) - (12/24) = (11 - 12) / 24 = -1/24

10. 9/16 + 7/24 - 3/8: (9/16) + (7/24) - (3/8) = (27/48) + (14/48) - (18/48) = (27 + 14 - 18) / 48 = 23/48

11. 1/3 - 1/6 + 1/4: (1/3) - (1/6) + (1/4) = (2/6) - (1/6) + (3/12) = (2 - 1 + 3) / 12 = 4/12 (после сокращения дроби на 4)

12. 2/5 + 4/15 - 5/9: (2/5) + (4/15) - (5/9) = (18/45) + (12/45) - (25/45) = (18 + 12 - 25) / 45 = 5/45 (после сокращения дроби на 5)

Таким образом, результаты всех вычислений даны выше.