Question

Выполните действое 7/20+11/30; 19/60-8/45; 5/48+17/36 ; 11/30-16/45

Answer 1

1) 210+220/60=430/60=7целых 1/6, 2)57-32/180=25/180=5/36 3) 15+68/144=83/144  4)33-32/90=1/90

Answer 2

1)43/60
2)5/36
3)83/144
4)1/90

Answer 3

Calculation of Fractions

Let's calculate the given expressions involving fractions step by step:

1. 7/20 + 11/30: - To add fractions, we need to find a common denominator. In this case, the common denominator is 60, which is the least common multiple of 20 and 30. - We can convert both fractions to have a denominator of 60: - 7/20 = (7 * 3)/(20 * 3) = 21/60 - 11/30 = (11 * 2)/(30 * 2) = 22/60 - Now, we can add the fractions: 21/60 + 22/60 = (21 + 22)/60 = 43/60.

2. 19/60 - 8/45: - Again, we need to find a common denominator. The least common multiple of 60 and 45 is 180. - Converting the fractions to have a denominator of 180: - 19/60 = (19 * 3)/180 = 57/180 - 8/45 = (8 * 4)/180 = 32/180 - Subtracting the fractions: 57/180 - 32/180 = (57 - 32)/180 = 25/180, which can be simplified to 5/36.

3. 5/48 + 17/36: - The common denominator for 48 and 36 is 144. - Converting the fractions to have a denominator of 144: - 5/48 = (5 * 3)/144 = 15/144 - 17/36 = (17 * 4)/144 = 68/144 - Adding the fractions: 15/144 + 68/144 = (15 + 68)/144 = 83/144.

4. 11/30 - 16/45: - Finding the common denominator, which is 90 (the least common multiple of 30 and 45). - Converting the fractions to have a denominator of 90: - 11/30 = (11 * 3)/90 = 33/90 - 16/45 = (16 * 2)/90 = 32/90 - Subtracting the fractions: 33/90 - 32/90 = 1/90.

Therefore, the results of the given expressions are: - 7/20 + 11/30 = 43/60 - 19/60 - 8/45 = 5/36 - 5/48 + 17/36 = 83/144 - 11/30 - 16/45 = 1/90.

Please let me know if you need any further assistance!