Question

2/7-1 3/7 4 1/3-5 5 3/4-2 1/4

Answer 1

Ответ:

всё на данном скриншоте

Answer 2

To solve the given expressions, let's perform the operations step by step:

1. 2/7 - 1/3:

To subtract fractions, we need a common denominator. The common denominator here would be 21, which is the least common multiple of 7 and 3.

Converting the fractions to have the common denominator: 2/7 = 6/21 1/3 = 7/21

Now we can subtract the fractions: 6/21 - 7/21 = (6 - 7)/21 = -1/21

Therefore, 2/7 - 1/3 is equal to -1/21.

2. 3/7 + 4:

To add a fraction and a whole number, we need to convert the whole number to a fraction with a denominator of 1.

Converting 4 to a fraction: 4 = 4/1

Now we can add the fractions: 3/7 + 4/1 = (3 + 28)/7 = 31/7

Therefore, 3/7 + 4 is equal to 31/7.

3. 5 3/4 - 2 1/4:

To subtract mixed numbers, we need to separately subtract the whole numbers and the fractions.

Subtracting the whole numbers: 5 - 2 = 3

Subtracting the fractions: 3/4 - 1/4 = 2/4 = 1/2

Therefore, 5 3/4 - 2 1/4 is equal to 3 1/2.

In summary:

1. 2/7 - 1/3 = -1/21
2. 3/7 + 4 = 31/7
3. 5 3/4 - 2 1/4 = 3 1/2