Question

Помогите решить пожалуйста (Х-11/30)-16/45=2/9 и задачки: 1)Три подруги сьели торт. первая подруга съела 1/4 торта,вторая 1/3 торта. какую часть торта съела третья подруга? 2) На завтрак винни-пух съел 2/9 горшочка меда,что на 2/15 горшочка меньше чем он съел на обед. Какую часть горшочка меда винни-пух съел на завтрак и на обед? очень поможете.Спасибо

Answer 1

1.
Х = 2/9 + 16/45 + 11/30 = (НОК=90) = (20+32+33)/90  = 85/90 - 17/18 - ОТВЕТ
2.
1/4 + 1/3 = 7/12 - две подруги
1 = 7/12 = 5/12 - третья - ОТВЕТ
3.
2/9 + 2/15 = 16/45 - на обед
2/9 + 16/45 = 26/45 - до ужина - ОТВЕТ

Answer 2

I'd be happy to help you with your questions! Let's start with the first one:

1) Three friends ate a cake. The first friend ate 1/4 of the cake, the second friend ate 1/3 of the cake. What fraction of the cake did the third friend eat?

To find out what fraction of the cake the third friend ate, we need to subtract the portions eaten by the first two friends from the whole cake.

The first friend ate 1/4 of the cake, and the second friend ate 1/3 of the cake. To find the remaining fraction, we subtract these two fractions from 1 (since 1 represents the whole cake):

1 - 1/4 - 1/3

To simplify this expression, we need to find a common denominator for 4 and 3, which is 12.

So, the expression becomes:

12/12 - 3/12 - 4/12

Simplifying further, we get:

(12 - 3 - 4)/12 = 5/12

Therefore, the third friend ate 5/12 of the cake.

Now, let's move on to the second question:

2) Winnie-the-Pooh ate 2/9 of a honey pot for breakfast, which is 2/15 less than what he ate for lunch. What fraction of the honey pot did Winnie-the-Pooh eat for breakfast and lunch combined?

To find the fraction of the honey pot that Winnie-the-Pooh ate for breakfast and lunch combined, we need to add the portions he ate for breakfast and lunch.

Winnie-the-Pooh ate 2/9 of the honey pot for breakfast, which is 2/15 less than what he ate for lunch. To find the portion he ate for lunch, we need to add 2/15 to 2/9.

To find a common denominator for 9 and 15, we multiply them together, which gives us 135.

So, the expression becomes:

(2/9) + (2/15)

To add these fractions, we need to find a common denominator, which is 135:

(2 * 15 + 2 * 9) / 135

Simplifying further, we get:

(30 + 18) / 135 = 48/135

This fraction can be simplified by dividing both the numerator and denominator by their greatest common divisor, which is 3:

(48 ÷ 3) / (135 ÷ 3) = 16/45

Therefore, Winnie-the-Pooh ate 16/45 of the honey pot for breakfast and lunch combined.

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