Question

№1. а) 11/20-7/30= ; б) 5/8 -7/12 = ; №2. а) 13/20 и 3/4 = ; б) 7/9 и 5/6 = ; в) 0,3 и 2/7 = ; №3. а) х + 4/9=11/18; б) х-1/6=4/5; №4. решите задачу : Деталь состоит из двух частей . масса одной части 11/20 кг, а другой - на 1/10 кг больше .какова масса всей детали? №5. а) 2/3 + 0,15- 17/60 = ; б) 9/14 - ( 19/35+2/21) = ; №6. 13/15-х=1/5+1/6= ; спасибо зарание!!!!!!

Answer 1

19/60 б)1/24 номер 2 13/20 b 15/20 б)14/18 b 15 /18

Answer 2

1. а) To subtract fractions, you need to have a common denominator. In this case, the common denominator is 60. So, the calculation would be: 11/20 - 7/30 = (33/60) - (14/60) = 19/60.

б) To add fractions, you also need a common denominator. In this case, the common denominator is 24. So, the calculation would be: 5/8 + 7/12 = (15/24) + (14/24) = 29/24.

2. а) To add fractions, you need a common denominator. In this case, the common denominator is 20. So, the calculation would be: 13/20 + 3/4 = (13/20) + (15/20) = 28/20 = 7/5.

б) To add fractions, you need a common denominator. In this case, the common denominator is 18. So, the calculation would be: 7/9 + 5/6 = (14/18) + (15/18) = 29/18.

в) To add a decimal and a fraction, you can convert the decimal to a fraction. In this case, 0.3 can be written as 3/10. So, the calculation would be: 3/10 + 2/7 = (21/70) + (20/70) = 41/70.

3. а) To solve the equation, you need to isolate the variable x. The equation is: x + 4/9 = 11/18.

Subtracting 4/9 from both sides, we get: x = 11/18 - 4/9 = (11/18) - (8/18) = 3/18 = 1/6.

б) To solve the equation, you need to isolate the variable x. The equation is: x - 1/6 = 4/5.

Adding 1/6 to both sides, we get: x = 4/5 + 1/6 = (24/30) + (5/30) = 29/30.

4. The problem states that one part of the detail weighs 11/20 kg, and the other part weighs 1/10 kg more. To find the total weight of the detail, we need to add the weights of the two parts.

Let's denote the weight of the second part as x kg. Since the second part weighs 1/10 kg more than the first part, we can write the equation: x = 11/20 + 1/10.

Adding the fractions, we get: x = 11/20 + 2/20 = 13/20.

Therefore, the total weight of the detail is 11/20 kg + 13/20 kg = 24/20 kg = 6/5 kg.

5. а) To subtract fractions, you need a common denominator. In this case, the common denominator is 60. So, the calculation would be: 2/3 - 17/60 = (40/60) - (17/60) = 23/60.

б) To subtract fractions, you need a common denominator. In this case, the common denominator is 70. So, the calculation would be: 9/14 - (19/35 + 2/21) = 9/14 - (38/70 + 20/70) = 9/14 - 58/70 = (45/70) - (58/70) = -13/70.

6. To solve the equation, you need to isolate the variable x. The equation is: 13/15 - x = 1/5 + 1/6.

Adding 1/5 and 1/6, we get: 13/15 - x = (6/30) + (5/30) = 11/30.

Subtracting 11/30 from both sides, we get: -x = 11/30 - 13/15 = (11/30) - (26/30) = -15/30.

Multiplying both sides by -1, we get: x = 15/30 = 1/2.

I hope this helps! Let me know if you have any further questions.