Question

Выполните действия 2/9 + 5/18; 17/20 - 5/12; 11/15 - 3/10+1/45 заранее большое вам спасибо :з

Answer 1

$1) \frac{2}{9}+ \frac{5}{18}= \frac{2*2+5}{18}= \frac{9}{18}= \frac{1}{2} \\ 2) \frac{17}{20} - \frac{5}{12} = \frac{17*3-5*5}{60}= \frac{26}{60}= \frac{13}{20} \\ 3) \frac{11}{15} - \frac{3}{10} + \frac{1}{45} = \frac{11*6-3*9+1*2}{90}= \frac{41}{90}$

Answer 2

Calculating the Expressions

To solve the given expressions, we will perform the following calculations:

1. 2/9 + 5/18 2. 17/20 - 5/12 3. 11/15 - 3/10 + 1/45

Let's solve each expression step by step.

2/9 + 5/18

To add the fractions 2/9 and 5/18, we need to find a common denominator and then add the numerators.

The result is: ``` 2/9 + 5/18 = 4/18 + 5/18 = 9/18 = 1/2 ```

17/20 - 5/12

To subtract the fractions 17/20 and 5/12, we need to find a common denominator and then subtract the numerators.

The result is: ``` 17/20 - 5/12 = 51/60 - 25/60 = 26/60 = 13/30 ```

11/15 - 3/10 + 1/45

To add and subtract the fractions 11/15, 3/10, and 1/45, we first find a common denominator and then perform the operations.

The result is: ``` 11/15 - 3/10 + 1/45 = 88/90 - 27/90 + 2/90 = 63/90 + 2/90 = 65/90 = 13/18 ```

Final Results

After performing the calculations, the results are as follows: 1. 2/9 + 5/18 = 1/2 2. 17/20 - 5/12 = 13/30 3. 11/15 - 3/10 + 1/45 = 13/18

I hope this helps! If you have any more questions or need further assistance, feel free to ask.