Arithmetic Grade Six

Lesson Twenty-two: Carrying


Now for something a little more challenging. Take a look at this example:

   4358
  +2723
  -----

Next, add the numbers in the ones column:

     1
   4358
  +2623
  ------
      1

We get 11. We place the 1 in the tens column and we carry the one. Next we add up the numbers in the tens column.

     1
   4358
  +2623
  ------
     81


Next we add the numbers in the hundreds column:

     1
   4358
  +2623
  ------
    981

Finally, we add up the numbers in the thousands column:

     1
   4358
  +2623
  ------
   6981


Here's another example:


   1905
  +2817
  -----

STEP ONE: Since the 5 and 7 in the ones column adds up to 12 and 12 is greater than 9, we must carry.

     1
   1905
  +2817
  -----
      2

STEP TWO: Adding up the numbers in the tens column we get 2.

     1
   1905
  +2817
  -----
     22

STEP THREE: Adding up the numbers in the hundreds column we get 17 and so we must carry to the thousands column.

   1 1
   1905
  +2817
  -----
    722

Adding up the numbers in the thousands column we get 4.

   1 1
   1905
  +2817
  -----
   4722


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