Addition With Regrouping

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Addition with carrying is called addition with regrouping.
Steps involved in addition with carry
• First add the digits in the unit place.
• If the above addition is greater than or equal to 10 then write the unit
   place (ones place) digit below and tens place digit carry forward.
• Place the carry forward digit on the top of tens digit.
• Finally add all the three numbers.
• The answer may be two digit or three digit.

Example 1 : Add 58 + 23
Here 58 is a two digit number so write the numbers 5 and 8 according to their place values. So 5 is below tens (T) place and 8 is below ones place (O). The second number is 23 , which is also a two digit number so write it according to its place values.

   T      O
  (1)
   5     8
+ 2     3
  ______
   8     1

Example 2: 78 + 22
Write 78 and 22 according to their place value. Then add unit digit
(8 + 2= 10) as this answer is two digit so from that write 0 below the line in unit place column. Write Tens digit (1) below 'T' and above 7. Add all the three numbers ( 1 + 7 + 2 = 10). So the answer is 100.
   T      O
  (1)
   7     8
+ 2     2
  ______
   1 0  0

Example 3: 98 + 42

   T      O
  (1)
   9     8
+ 4     2
  ______
   1 4  0

For practice,download the following and send me the feedback
   T    O
   8    4
+ 7    6
  ______

   T    O
   8    8
+ 2    8
  ______

   T    O
   2    4
+ 5    9
  ______

   T    O
   6    2
+ 6    9
  ______

   T    O
   8    4
+ 2    6
  ______

   T    O
   1    7
+ 2    9
  ______

   T    O
   8    4
+ 1    8
  ______

   T    O
   3    8
+ 4    9
  ______

   T    O
   1    5
+ 4    7
  ______

   T    O
   5    2
+ 9    9
  ______


Addition with regrouping

1st Grade Math

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