Question

11/20 -5/12;3/16+1/24;7/25 -4/15;3/8 +7/20;19/45-7/18;

Answer 1

А) 11/20 -5/12 = 33/60 -25/60 = 6/60 = 1/10
б)3/16+1/24 = 9/48+2/48 = 11/48
в)7/25 -4/15 = 21/75 -20/75 = 1/75
г)3/8 +7/20 = 15/40 +14/40 = 29/40
д)19/45 -7/18 = 38/90 -35/90 = 3/90 = 1/30

Answer 2

Ответ     6/8
4/25
3/35
4/62

Answer 3

To solve the given expressions, let's simplify each expression step by step:

1. 11/20 - 5/12: To subtract fractions, we need a common denominator. The least common multiple (LCM) of 20 and 12 is 60. So, we can rewrite the expression as: - (11/20) * (3/3) - (5/12) * (5/5) - (33/60) - (25/60) - (33 - 25)/60 - 8/60, which simplifies to 2/15.

2. 3/16 + 1/24: Again, we need a common denominator. The LCM of 16 and 24 is 48. So, we can rewrite the expression as: - (3/16) * (3/3) + (1/24) * (2/2) - (9/48) + (2/48) - (9 + 2)/48 - 11/48.

3. 7/25 - 4/15: Finding a common denominator, the LCM of 25 and 15 is 75. So, we can rewrite the expression as: - (7/25) * (3/3) - (4/15) * (5/5) - (21/75) - (20/75) - (21 - 20)/75 - 1/75.

4. 3/8 + 7/20: Once again, we need a common denominator. The LCM of 8 and 20 is 40. So, we can rewrite the expression as: - (3/8) * (5/5) + (7/20) * (2/2) - (15/40) + (14/40) - (15 + 14)/40 - 29/40.

5. 19/45 - 7/18: Finding a common denominator, the LCM of 45 and 18 is 90. So, we can rewrite the expression as: - (19/45) * (2/2) - (7/18) * (5/5) - (38/90) - (35/90) - (38 - 35)/90 - 3/90, which simplifies to 1/30.

Therefore, the simplified expressions are: - 11/20 - 5/12 = 2/15 - 3/16 + 1/24 = 11/48 - 7/25 - 4/15 = 1/75 - 3/8 + 7/20 = 29/40 - 19/45 - 7/18 = 1/30

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