Kimberly's currently has a balance of - 20.59 in her checking account. Her bank requires her to maintain a minimum balance $40. How much does Kimberly need to deposit into her checking account to reach the minimum balance?

So, we have our numbers - 20.59 and 40.

We need to find the difference between the two.

When we subtract 40 from - 20.59 and make it absolute value, that is the distance between the two numbers on a number line. So, in order to reach the minimum distance on her checking account, she needs to deposit $60.59

Answer: She needs to deposit $60.59 into her checking account.