Question

выполните сложение:1 1/3 +2/3 ;2 3/5 +3 4/15 ; 9 1/9+1 8/9 выполните вычитание:1 13/18-13/18; 5 11/15-5 8/15 ;1 13/15; 1 13/15-17/20

Answer 1

1)1/3+2/3=3/3 или 1

2)3/5+3 4/15=3/5=9/15

9/15+3 4/15=3 13/15

3)9 1/9+1 8/9=10 9/9 ИЛИ 11

вычитание:

1)1 13/18-13/18=1

2)5 11/15-5 8/15=3/15

3)1 13/15-17/20   находим общий знаменатель=60

1 42/60-51/60=51/60

Удачи!

отметь как лучшее плиз

Answer 2

Давайте выполним указанные операции по очереди.

Сложение:

1 + 1/3 + 2/3:

To add fractions, we need to have a common denominator. In this case, the common denominator is 3. So, we have:

1 + (1/3) + (2/3) = 1 + (1/3) + (2/3) = (3/3) + (1/3) + (2/3) = 6/3 = 2

Therefore, the sum of 1 + 1/3 + 2/3 is 2.

2 + 3/5 + 3 + 4/15:

Again, we need to find a common denominator. The common denominator here is 15. So, we have:

2 + (3/5) + 3 + (4/15) = 2 + (9/15) + 3 + (4/15) = (2 + 9 + 3 + 4)/15 = 18/15 = 6/5

Therefore, the sum of 2 + 3/5 + 3 + 4/15 is 6/5.

9 + 1/9 + 1 + 8/9:

Once again, we need a common denominator. The common denominator here is 9. So, we have:

9 + (1/9) + 1 + (8/9) = (9 + 1 + 8)/9 + (1/9) = 18/9 + 1/9 = 19/9

Therefore, the sum of 9 + 1/9 + 1 + 8/9 is 19/9.

Вычитание:

1 + 13/18 - 13/18:

When subtracting fractions, we need to have a common denominator. The common denominator here is 18. So, we have:

1 + (13/18) - (13/18) = (18/18) + (13/18) - (13/18) = 18/18 = 1

Therefore, the difference between 1 + 13/18 - 13/18 is 1.

5 + 11/15 - 5 + 8/15:

Again, we need a common denominator. The common denominator here is 15. So, we have:

5 + (11/15) - 5 + (8/15) = (5 - 5) + (11/15) + (8/15) = 0 + 19/15 = 19/15

Therefore, the difference between 5 + 11/15 - 5 + 8/15 is 19/15.

1 + 13/15 - 17/20:

Once more, we need a common denominator. The common denominator here is 60. So, we have:

1 + (13/15) - (17/20) = (60/60) + (52/60) - (51/60) = 61/60

Therefore, the difference between 1 + 13/15 - 17/20 is 61/60.

I hope this helps! Let me know if you have any further questions.