Adding Three Digit Numbers

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In 2nd grade you will learn adding three digit numbers. There are some steps to follow with an example. 324 + 126.
• Write the given numbers one below the other in such a way that hundreds, tens and one places are lined up. Draw the line after lining up and put the plus sign on the left side of 2nd number.
H T O
3 2 4
+1 2 6
-------------
• Add one place digits ( 4 + 6 = 10) This number is two digit number so place one's place digit from 10 ( 0) in one's place column and place ten's digit number (1) above 2 in tens column.
1
H T O
3 2 4
+1 2 6
-------------
0
• Add all tens digit numbers ( 1+ 2 + 2 = 5). Write this number below tens digit column.
1
H T O
3 2 4
+1 2 6
-------------
5 0
• Finally add all the digit from hundreds column.( 3 + 1 = 4)

Example 1 : Add 764 + 358
    1    1   
    7    6    4
 + 3    5    8 
 -------------
  1 1   2    2

Example 2 : 907 + 564
          1
    9    0    7
 + 5    6    4 
 ----------------
  1 4   7    1

Example 3: 600 + 400
    6    0    0
+ 4    0    0 
 ----------------
  1 0   0    0

Practice

6 6 4
+ 3 7 8
-------------

8 2 4
+ 3 6 8
-------------

9 6 4
+ 2 1 5
-------------

4 3 8
+ 2 5 8
-------------

6 6 1
+ 3 5 9
-------------

1 6 4
+ 9 5 8
-------------

3 6 4
+ 3 5 1
-------------

5 5 5
+ 1 9 8
-------------

4 6 7
+ 1 6 9
-------------

8 2 7
+ 4 5 5
-------------

8 8 4
+ 2 7 8
-------------

9 9 4
+ 1 9 0
-------------

2 3 8
+ 3 7 5
-------------

4 0 8
+ 1 9 6
-------------

8 8 8
+ 7 7 7
-------------


Adding three digit numbers

2nd Grade Math

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