Question

424. Выполните сложение: 2/5 + 4/25, 19/42+6/7, 3/8+ 1/56Помогите пожалуйста....​

Answer 1

Ответ:

2/5 + 4/25 = 5*2/5*5 + 1*4/ 1*25 = 10+4/25 = 14/25,

19/42+6/7 = 1*19/1*42 + 6*6/6*7 = 19+36/42 = 55/42 = 1  13/42 (одна целая тринадцать сорок вторых)

3/8+ 1/56 = 7*3/7*8 + 1*1/1*56 = 21+1/56 = 22/56 = (сокращение дроби) 11*2/28*2 = 11/28.

Чтобы не было трудно на держи сыллку на калькулятор дробей:

https://calc.by/math-calculators/fraction-calculator.html

Пошаговое объяснение:

Answer 2

Ответ:

1) 14/25= 0,56

2) 1 13/42

3) 11/28

Answer 3

To perform the addition of fractions, we need to find a common denominator for each set of fractions. Let's solve the addition problem step by step:

1. Addition of 2/5 and 4/25: To add 2/5 and 4/25, we need to find a common denominator. The least common multiple (LCM) of 5 and 25 is 25. So, we can rewrite the fractions with a common denominator of 25: - 2/5 = 10/25 - 4/25 = 4/25 Now, we can add the fractions: - 10/25 + 4/25 = 14/25

2. Addition of 19/42 and 6/7: To add 19/42 and 6/7, we need to find a common denominator. The least common multiple (LCM) of 42 and 7 is 42. So, we can rewrite the fractions with a common denominator of 42: - 19/42 = 19/42 - 6/7 = 36/42 Now, we can add the fractions: - 19/42 + 36/42 = 55/42

3. Addition of 3/8 and 1/56: To add 3/8 and 1/56, we need to find a common denominator. The least common multiple (LCM) of 8 and 56 is 56. So, we can rewrite the fractions with a common denominator of 56: - 3/8 = 21/56 - 1/56 = 1/56 Now, we can add the fractions: - 21/56 + 1/56 = 22/56

Therefore, the result of the addition is: - 2/5 + 4/25 + 19/42 + 6/7 + 3/8 + 1/56 = 14/25 + 55/42 + 22/56

Let's simplify the result: - 14/25 + 55/42 + 22/56 = 3136/7000 + 8250/7000 + 616/7000 = (3136 + 8250 + 616)/7000 = 12002/7000

The simplified result is 12002/7000.

Please let me know if you need any further assistance!