Question

2,5+(-4 1/3)+(-1 13/15)

Answer 1

2,5-4 1/3- 1 13/15= 2 15/30- 4 10/30- 1 26/30= -(4 10/30+ 1 26/30)+2 15/30= -6 6/30 + 2 15/30= -3 21/30= -3,7

Answer 2

To add these numbers, first, we need to make sure they have a common denominator. The common denominator for 3, 15, and 15 is 15. Let's convert each number to have the same denominator:

2,5 = 2 + 5/1 = 2 + 5 = 7 -4 1/3 = -4 + 1/3 = -4 + (1/3)*(5/5) = -4 + 5/15 = -4 5/15 -1 13/15 = -1 + 13/15

Now, we can add the numbers:

7 + (-4 5/15) + (-1 + 13/15)

Next, let's convert the mixed numbers to improper fractions:

-4 5/15 = -(415 + 5)/15 = -65/15 -1 + 13/15 = -(115 + 13)/15 = -28/15

Now, the expression becomes:

7 + (-65/15) + (-28/15)

To add fractions, we need to have a common denominator, which is 15:

7 + (-65/15) + (-28/15) = 7 + (-65 - 28)/15 = 7 + (-93)/15

Finally, we can simplify the result:

7 + (-93)/15 = (7*15 - 93)/15 = (105 - 93)/15 = 12/15

The final answer is 12/15, which can be simplified further:

12/15 = (12/3)*(1/5) = 4/5

So, 2,5 + (-4 1/3) + (-1 13/15) is equal to 4/5.