aleks_alekseev

To subtract 1 6/7 from 6, we need to convert 6 to a fraction with the same denominator as 1 6/7, which is 7. 6 can be written as 6/1. Now we can subtract the fractions: 6/1 - 1 6/7 = (42/7) - (13/7) = 29/7 So, the result is 29/7.

To solve the expression 15,25-4 1/6-(5,15-2 2/3), we can break it down step by step. First, let's simplify the expression within the parentheses (5,15-2 2/3): To subtract mixed numbers, we need to convert them into improper fractions. 5,15 = 5 + 15/100 = 5 + 15/100 = 5 + 3/20 = 5 3/20 2 2/3 = 2 + 2/3 = 2 + 2/3 = 2 2/3 Now, subtract 2 2/3 from 5 3/20: 5 3/20 - 2 2/3 = (5*20 + 3)/20 - (2*3 + 2)/3 = (100 + 3)/20 - (6 + 2)/3 = 103/20 - 8/3 To subtract fractions, we need to have a common denominator. The least common multiple of 20 and 3 is 60. 103/20 = (103*3)/(20*3) = 309/60 8/3 = (8*20)/(3*20) = 160/60 Now, subtract the fractions: 309/60 - 160/60 = (309 - 160)/60 = 149/60 Now, let's