(5 3/7+2 1/7)-4 5/7

To solve the expression (5 3/7 + 2 1/7) - 4 5/7, we need to add the two initial fractions first and then subtract the final fraction.

First, let's add 5 3/7 + 2 1/7: 5 3/7 = (75 + 3)/7 = 38/7 2 1/7 = (72 + 1)/7 = 15/7

Now, adding both fractions: 38/7 + 15/7 = 53/7

Next, subtract 4 5/7 from the sum: 4 5/7 = (7*4 + 5)/7 = 33/7

Finally, subtract 33/7 from 53/7: 53/7 - 33/7 = 20/7

Therefore, (5 3/7 + 2 1/7) - 4 5/7 = 20/7

Для решения выражения (5 3/7 + 2 1/7) - 4 5/7 сначала нужно сложить две начальные дроби, а затем вычесть конечную дробь. 5 3/7 + 2 1/7 = 53/7, 4 5/7 = 33/7, итак, (5 3/7 + 2 1/7) - 4 5/7 = 20/7.