answersLogoWhite

0


Best Answer

20+(-15)=5

You just took 15 from 20. When adding negative numbers to positive ones, you move LEFTWARD on the number line toward 0 (because that's where the negative numbers are).

As I understand the question:

If 20 and a number (x) = a negative 15 (-15), then you can write it out as an equation to get the answer:

20 + x = -15 is the equation (x represents the number)

20 - 20 + x = -15 - (-20) (what you do to one side you must do to the other)

x = -35

Therefore, the sum of 20 and -35 is -15.

User Avatar

Wiki User

13y ago
This answer is:
User Avatar

Add your answer:

Earn +20 pts
Q: How do you write the sum of twenty and a number is negative fifteen?
Write your answer...
Submit
Still have questions?
magnify glass
imp