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Everyday
Mathematics
Column Addition
Column Addition
Column addition involves:
โ€ข Recording numbers in place-value columns;
โ€ข Adding in place-value columns; and
โ€ข Making and moving groups of 1s, 10s, 100s,
and so on.
Everyday
Column Addition
Solve: 379 + 562
We set up the problem by writing
the numbers in their place-value
columns.
H = hundreds
T = tens
O = ones
T
3 7 9
+ 5 6 2
Everyday
H O
Column Addition
Solve: 379 + 562
We add the digits in each column,
keeping the sums separate in the
place-value columns.
It doesnโ€™t matter if we start at the
left or at the right.
H T O
3 7 9
+ 5 6 2
Everyday
8 1113
Column Addition
Solve: 379 + 562
We make adjustments so each
column has only one digit. This
can be done in any order, but itโ€™s
most efficient to start with the
ones place-value column.
H T O
3 7 9
+ 5 6 2
8 13 11
Everyday
Column Addition
Solve: 379 + 562
The 11 in the ones column
represents 11 ones.
Remember: 11 = 10 + 1
Move 10 ones to the tens column
as 1 ten.
H T O
3 7 9
+ 5 6 2
8 13 11
Everyday
Column Addition
Solve: 379 + 562
Now we can rewrite the answer:
โ€ข There are still 8 hundreds.
โ€ข There are 14 tens (13 tens + 1
ten = 14 tens).
โ€ข There is only 1 one left in the
ones column.
Remember that we moved 10 ones
to the tens column as 1 ten.
H T O
3 7 9
+ 5 6 2
8 13 11
14
Everyday
18
Column Addition
Solve: 379 + 562
Now letโ€™s adjust the tens column.
The 14 in the tens column
represents 14 tens.
14 tens = 10 tens + 4 tens
Remember: 10 tens is
1 hundred.
Move 10 tens to the hundreds
column as 1 hundred.
H T O
3 7 9
+ 5 6 2
8 13 11
8 14 1
Everyday
Column Addition
Solve: 379 + 562
Now letโ€™s adjust the tens column.
The 14 in the tens column
represents 14 tens.
14 tens = 10 tens + 4 tens
Remember: 10 tens is
1 hundred.
Move 10 tens to the hundreds
column as 1 hundred.
H T O
3 7 9
+ 5 6 2
8 13 11
8 14 1
9 4 1
Everyday
Column Addition
Now we can rewrite the answer:
โ€ข There are now 9 hundreds in the
โ€ข hundreds column (8 hundreds + 1
โ€ข hundred = 9 hundreds).
โ€ข There are only 4 tens left in the
โ€ข tens column. (Remember that we
โ€ข moved 10 tens to the hundreds
column.)
โ€ข There is still 1 one in the ones
column.
Since we now have exactly one digit
in each of the place-value columns,
our work is done.
H T O
3 7 9
+ 5 6 2
8 13 11
8 14 1
4
Everyday
19
Column Addition
379 + 562 = 941
H T O
3 7 9
+ 5 6 2
8 13 11
8 14 1
9 4 1
Everyday

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Column+addition.dr.cx

  • 2. Column Addition Column addition involves: โ€ข Recording numbers in place-value columns; โ€ข Adding in place-value columns; and โ€ข Making and moving groups of 1s, 10s, 100s, and so on. Everyday
  • 3. Column Addition Solve: 379 + 562 We set up the problem by writing the numbers in their place-value columns. H = hundreds T = tens O = ones T 3 7 9 + 5 6 2 Everyday H O
  • 4. Column Addition Solve: 379 + 562 We add the digits in each column, keeping the sums separate in the place-value columns. It doesnโ€™t matter if we start at the left or at the right. H T O 3 7 9 + 5 6 2 Everyday 8 1113
  • 5. Column Addition Solve: 379 + 562 We make adjustments so each column has only one digit. This can be done in any order, but itโ€™s most efficient to start with the ones place-value column. H T O 3 7 9 + 5 6 2 8 13 11 Everyday
  • 6. Column Addition Solve: 379 + 562 The 11 in the ones column represents 11 ones. Remember: 11 = 10 + 1 Move 10 ones to the tens column as 1 ten. H T O 3 7 9 + 5 6 2 8 13 11 Everyday
  • 7. Column Addition Solve: 379 + 562 Now we can rewrite the answer: โ€ข There are still 8 hundreds. โ€ข There are 14 tens (13 tens + 1 ten = 14 tens). โ€ข There is only 1 one left in the ones column. Remember that we moved 10 ones to the tens column as 1 ten. H T O 3 7 9 + 5 6 2 8 13 11 14 Everyday 18
  • 8. Column Addition Solve: 379 + 562 Now letโ€™s adjust the tens column. The 14 in the tens column represents 14 tens. 14 tens = 10 tens + 4 tens Remember: 10 tens is 1 hundred. Move 10 tens to the hundreds column as 1 hundred. H T O 3 7 9 + 5 6 2 8 13 11 8 14 1 Everyday
  • 9. Column Addition Solve: 379 + 562 Now letโ€™s adjust the tens column. The 14 in the tens column represents 14 tens. 14 tens = 10 tens + 4 tens Remember: 10 tens is 1 hundred. Move 10 tens to the hundreds column as 1 hundred. H T O 3 7 9 + 5 6 2 8 13 11 8 14 1 9 4 1 Everyday
  • 10. Column Addition Now we can rewrite the answer: โ€ข There are now 9 hundreds in the โ€ข hundreds column (8 hundreds + 1 โ€ข hundred = 9 hundreds). โ€ข There are only 4 tens left in the โ€ข tens column. (Remember that we โ€ข moved 10 tens to the hundreds column.) โ€ข There is still 1 one in the ones column. Since we now have exactly one digit in each of the place-value columns, our work is done. H T O 3 7 9 + 5 6 2 8 13 11 8 14 1 4 Everyday 19
  • 11. Column Addition 379 + 562 = 941 H T O 3 7 9 + 5 6 2 8 13 11 8 14 1 9 4 1 Everyday