Question

1) 9 + ( -1 1\2 ) = 2 ) 8 + ( - 2 5\7 ) = 3) 5 + ( - 6 2\3 ) = плиз хелп

Answer 1

1)9+(-11/2)=3,5
2)8+(-25/7)=4,42
3)5+(-62/3)=15,67

Answer 2

Of course, I'd be happy to help you with these arithmetic calculations. Let's solve each of these step-by-step:

1. 9 + (-1 1/2) To add these two numbers, we need to convert -1 1/2 to an improper fraction. The improper fraction equivalent of -1 1/2 is -3/2. Now, we can add the numbers: 9 + (-3/2) = 9 - 3/2 = 9 - 1.5 = 7.5

So, 9 + (-1 1/2) = 7.5

2. 8 + (-2 5/7) Similarly, let's convert -2 5/7 to an improper fraction. The improper fraction equivalent of -2 5/7 is -19/7. Now, we can add the numbers: 8 + (-19/7) = 8 - 19/7 ≈ 8 - 2.71 ≈ 5.29

So, 8 + (-2 5/7) ≈ 5.29

3. 5 + (-6 2/3) Converting -6 2/3 to an improper fraction gives us -20/3. Now, let's add the numbers: 5 + (-20/3) = 5 - 20/3 ≈ 5 - 6.67 ≈ -1.67

So, 5 + (-6 2/3) ≈ -1.67

Final results:

1. 9 + (-1 1/2) = 7.5
2. 8 + (-2 5/7) ≈ 5.29
3. 5 + (-6 2/3) ≈ -1.67

If you have any more questions or need further assistance, feel free to ask!