Question

(7/10+3/5)-(1/6+3/3)2/3-(1/20+2/9)-5/181/3+1/4+1/5+1/6+1/7​

Answer 1

Ответ:

1)(7/89+3/2)-(1+9)

2)(2/4-1/30)-(7/9-2/5)

3)(1/5-7/5)+1/5+1/7+1/6

Пошаговое объяснение:

вооот првильно

Answer 2

To simplify the expression, let's break it down step by step:

1. (7/10 + 3/5):

   To add these fractions, we need to find a common denominator, which is 10 in this case.

   (7/10 + 3/5) = (7/10 + 6/10) = 13/10.

2. (1/6 + 3/3):

   (1/6 + 3/3) = (1/6 + 1) = 7/6.

3. (2/3 - (1/20 + 2/9)):

   First, add the fractions inside the parentheses:

   (1/20 + 2/9) = (9/180 + 40/180) = 49/180.

   Now, subtract this value from 2/3:

   (2/3 - 49/180) = (80/120 - 49/180) = (40/60 - 49/180) = (40/60 - 7/60) = 33/60.

   Simplify this fraction by dividing both the numerator and denominator by their greatest common divisor, which is 3:

   (33/60) ÷ 3 = (11/20).

4. -5/18.

5. (1/3 + 1/4 + 1/5 + 1/6 + 1/7):

   To add these fractions, find a common denominator, which is 420 in this case.

   (1/3 + 1/4 + 1/5 + 1/6 + 1/7) = (140/420 + 105/420 + 84/420 + 70/420 + 60/420) = (459/420).

Now, put it all together:

(13/10) - (7/6) - (11/20) - (5/18) + (459/420)

To subtract fractions, they need a common denominator, which in this case is 420.

(546/420) - (490/420) - (231/420) - (350/420) + (459/420)

Now, add and subtract the fractions:

(546 - 490 - 231 - 350 + 459) / 420

(434/420) / 420

Now, simplify the fraction by dividing both the numerator and denominator by their greatest common divisor, which is 14:

(31/30) / 14

Now, divide the fractions:

(31/30) ÷ 14 = 31 / (30 * 14) = 31 / 420

So, the simplified expression is 31/420.