This document provides instructions for adding and subtracting whole numbers. It begins by outlining some key properties of addition, such as the associative, commutative, and zero properties. Examples are then given to demonstrate how to add and subtract whole numbers by lining up the numbers by place value and carrying or borrowing as needed. More practice problems are provided for additional examples of adding and subtracting whole numbers.

1. Adding and Subtracting Whole NumbersBy Angela Gusmano

2. Adding

3. First, you need to know…Associative Property of AdditionWhen: (a + b) + c = a + (b + c)Commutative Property of AdditionWhen: a + b= b + aZero Property of AdditionWhen: a + 0= a

4. 4,285+ 124Always start with the ones.

5. Let’s Try Some!1114,285+ 1244,4092,402+1,7894,191

6. More Practice!1111 5,765+ 6,34112,1061,891+ 2982,189

7. Subtraction

8. 4,987- 2,158Always start with the ones.

9. Let’s Try Some!212177 4,987- 2,1583,230- 3201,910 2,829

10. More Practice!112412810 9,222- 6,180 5,290- 1,488 3,8023,042

11. Now you should be able to add and subtract whole numbers!

12. Sourceshttp://michigan.gov/documents/MathGLCE_140486_7.pdfhttp://www.eduplace.com/math/mw/g_4.html