Question

4) 3,71 + ((-2,71) + 9);5) 143 + (-176) + 166;6) 43,1 - (7,8 - (-23,1)).​

Answer 1

Ответ:

4) 10

5)133

6) 12,2

так вот

Answer 2

Let's solve these arithmetic expressions step by step:

4. 3.71 + ((-2.71) + 9)

First, add the negative number and 9 within the inner parentheses: 3.71 + (-2.71 + 9)

Now, add the numbers inside the parentheses: 3.71 + 6.29

Finally, add these two numbers together: 3.71 + 6.29 = 10

So, the answer to the first expression is 10.

5. 143 + (-176) + 166

Simply add the numbers together: 143 + (-176) + 166 = 133

The answer to the second expression is 133.

6. 43.1 - (7.8 - (-23.1))

First, calculate the value inside the innermost parentheses by adding 23.1 to 7.8: 43.1 - (7.8 + 23.1)

Now, add 7.8 and 23.1: 43.1 - 30.9

Finally, subtract 30.9 from 43.1: 43.1 - 30.9 = 12.2

So, the answer to the third expression is 12.2.