Question

3_5дробью-4_5дробью; 2_7-(3_7); -1_2-1_4;

Answer 1

3/5-4/5=-1/5

2/7-(3/7)=-1/7

-1/2-1/4=-3/4

Answer 2

To perform the operations with mixed fractions, you need to convert them into improper fractions first and then carry out the respective operations. Here's how to do each calculation:

1. Subtract 3/5 from 4/5: To subtract fractions, they need to have the same denominator. The common denominator for 5 and 5 is 5. Now, we have: 3/5 - 4/5 = (3 - 4)/5 = -1/5

2. Subtract 3/7 from 2/7: Since the denominators are the same (both are 7), we can directly subtract the numerators: 2/7 - 3/7 = (2 - 3)/7 = -1/7

3. Subtract 1/2 from 1/4: To subtract fractions, they need to have the same denominator. The common denominator for 2 and 4 is 4. Now, we have: 1/2 - 1/4 = (2/4 - 1/4) = 1/4

So, the results are:

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