Question

18 4/21-(10 10/21 + 3 19/21)​

Answer 1

Ответ:

$18 \frac{4}{21} - (10 \frac{10}{21} + 3 \frac{19}{21} ) = \\ \frac{382}{21} - ( \frac{220}{21} + \frac{82}{21} ) = \\ \frac{382}{21} - \frac{302}{21} = \frac{382 - 302}{21} = \\ = \frac{80}{21} = 3 \frac{17}{21}$

Answer 2

To solve the expression 18 + 4/21 - (10 + 10/21 + 3 + 19/21), we can follow the order of operations (PEMDAS/BODMAS) to simplify it step by step.

Step 1: Simplify the expression inside the parentheses

Inside the parentheses, we have 10 + 10/21 + 3 + 19/21. Let's simplify this expression first.

- 10 + 10/21 can be simplified to 10 + 0.476 or 10.476. - 3 + 19/21 can be simplified to 3 + 0.905 or 3.905.

So, the expression inside the parentheses simplifies to 10.476 + 3.905 or 14.381.

Step 2: Substitute the simplified expression back into the original expression

Now, we can substitute the simplified expression back into the original expression:

18 + 4/21 - (10 + 10/21 + 3 + 19/21) becomes 18 + 4/21 - 14.381.

Step 3: Perform the remaining operations

Now, we can perform the remaining operations:

- 18 + 4/21 can be simplified to 18 + 0.190 or 18.190. - 18.190 - 14.381 can be simplified to 3.809.

Therefore, the value of the expression 18 + 4/21 - (10 + 10/21 + 3 + 19/21) is 3.809.

Please note that the sources provided do not directly answer the question. However, the calculations performed are based on the mathematical rules of addition and subtraction.