- Students will recall all the addition rules:
Example: 
a) When you change the order of numbers while adding, the sum does not change.
b) The sum is always greater than the numbers being added except when one of the numbers is a zero. 
c) When you add 1 to a number the sum is a number after.
d) The sum of zero and any number is the same number.
-Explanation on how to regroup the numbers upto 3-digits and adding them by keeping the rules in mind.
- Students will be asked to solve the 3-digit addition starting from ones place and moving to hundreds place.
-Example:
 Th  H   T  O
   5  2   1   2       (ADDENDS)   <=  Addition starts from ones place after regrouping.
+ 1  5   1  0        (ADDENDS)   
_________
   6  7  2  2     (SUM OF ADDENDS)   <=  Addition starts from ones place after regrouping.
_________

