Whole Numbers: Addition

First, we need to work on place values:

45 971
|  |  | | |___ Ones 1's
|  |  | |____ Tens 10's
|  |  |_____ Hundreds 100's
|  |_______Thousands 1 000's
|_________Ten Thousands 10 000's


If we expand this out, we get:

45971 = 40 000 + 5 000 + 900 + 70 + 1


Write this from up to down:

   4|0|0|0|0|
     |5|0|0|0|
        |9|0|0|
           |7|0|
 +           |1|
   4 5 9 7 1



How to add up numbers:

Example: 53 681 + 7927 = ?

• Line up the numbers:

   5|3|6|8|1|
+   |7|9|2|7|
________

• Add up the numbers starting from place value ones to ten thousands:

      1  1  1
   5|3|6|8|1|
+   |7|9|2|7|
   6 1 6 0 8