Mathematical+Reflections,+p.+33

R.G. Big Idea: Negative numbers help us to model many real world situations Essential Question: How can i add integers?
 * 8/4/09

1. When you add two integers, how can you decide whether their sum will be positive, negative, or if it will be zero?** The sum will be positive if the bigger number is positive, but if the bigger number is negative then the sum will be negative. But also, if the numbers are equal, except one is negative and one is positive, the sum will be zero.

If both numbers are positive then you do simple addition. But if the numbers are negative, add the digits and then put a negative sign at the top of the number.
 * 2. Describe how to add any two integers.**

a)** If a number is positive, then put a negative sign. (7 = -7)
 * 3. Explain how you can find the opposite of a number. Use the following examples to illustrate your explanations.
 * b)** Zero has no opposite (0 = 0)
 * c)** If the number is negative, then take away the negative sign and just leave the number. (-12 = 12)

I have learned in this section about positive and negative numbers. I now know how to add and subtract negative and positive numbers also. And i know how to add integers both positive and negative. I have also found out what a time line means too.
 * Summary:**

I was confused on how to add positive and negative numbers together but see which number if it would be positive or negative but i know now.
 * Notes:**