Question

12 2/7 + 5 5/14 - 4 5/7​

Answer 1

Ответ:

вот 12 2/7+5 5/14-4 5/7=12 4/14+5 5/14-4 10/14=13 -1/14

Answer 2

To add and subtract mixed numbers, you can follow these steps:

1. Convert each mixed number to an improper fraction.
2. Perform the addition and subtraction on the improper fractions.
3. Convert the result back to a mixed number, if necessary.

Let's calculate the expression step by step:

1. Convert the mixed numbers to improper fractions:

   • 12 2/7 = (7 * 12 + 2) / 7 = 86/7
   • 5 5/14 = (14 * 5 + 5) / 14 = 75/14
   • 4 5/7 = (7 * 4 + 5) / 7 = 33/7

2. Now, perform the operations: 86/7 + 75/14 - 33/7

3. Find a common denominator, which is 14: (2 * 86/7) + 75/14 - (2 * 33/7)

4. Add and subtract: (172/14) + 75/14 - (66/14)

5. Combine the fractions: (172 + 75 - 66) / 14

6. Perform the arithmetic: (181/14)

Now, we have an improper fraction. You can convert it back to a mixed number:

7. Divide the numerator by the denominator: 181 ÷ 14 = 12 with a remainder of 5.

So, the final result is 12 5/14, which can be further simplified to 12 5/7 if needed.