In Feburary 2016 27,
Understand that when numbers have no signs in front of them, they are positive. For example, if you have the problem 3 + 5 = ?, both 3 and 5 are positive. You simply add the numbers together using elementary math. For example, find 3 on a number line and count five places to the right to solve the problem: 3 + 5 = 8. Adding two positive numbers always produces a positive result.
Ignore the signs of the numbers initially when adding two negative numbers. Follow the same procedure for adding positive numbers. For example, for -3 + -5 = ?, make the problem 3 + 5 = ? and solve it. The result will be 8. Once you have a solution, add a negative sign in front of the number. So 8 becomes -8.Think about it this way: Say a friend borrowed $3 from you last week, then borrowed $5 from you today. Your friend now owes you $8.
Examine problems that have one positive number and one negative number. If the positive number is larger, subtract the numbers, and then put the positive sign in front of the answer. For example, suppose the problem were 8 + -3 = ?. You would convert the problem to 8 - 3 = ? The result would be 5. You can also use a number line, start at 8 and go three places to the left to find that 5 is the result.
Subtract the numbers and put a negative sign in front of the result if the negative number is larger. For example, consider -5 + 3 = ? You would subtract 3 from 5 to get 2, then add a negative sign for your result: -2.
In Feburary 2016 27,
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