How it works
Line the numbers up in a column: ones under ones, tens under tens.
Add the ones column first. If it makes ten or more, write the ones and move the tens over.
Then add the tens column, plus anything you moved.
Worked examples
Three numbers
- 49 + 14 + 14 = ?
- Line up the ones and the tens.
- Add the ones column, move any tens, then add the tens column.
- So the answer is 77.
Four numbers
- 37 + 32 + 38 + 33 = ?
- Add the ones column. It may need to move more than one ten.
- Then the tens, counting what you moved.
- So the answer is 140.
A total over a hundred
- 44 + 5 + 56 + 49 = ?
- Add the ones, then the tens.
- When the tens make ten or more, that is a hundred.
- So the answer is 154.
A taste of the worksheet
These are the first problems of set A. The printable sheet has many more, with an answer key.
- __ = 26 + 19 + 21
- __ = 27 + 25 + 35
- 25 + 26 + 26 = __
- __ = 14 + 39 + 44
- __ = 12 + 63 + 17