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Math: Addition - Tutorial
Addition is putting two or more like things together to show how many there are in all.
Just for Practice
A Closer Look
An addition sentence can be written horizontally or vertically as shown below:
Commutative Property
The commutative property tells us that changing the order of the addends in an addition sentence does not change the sum.
Adding Single and Double-Digit Addends
Example 1: Add two single-digit addends.
Example 2: Add a double-digit and a single-digit addend. Add one column at a time beginning with the ones column. Click on the Extra Study Help link shown above for
help with place value.
The sum is 12.
The sum is 43.
Example 3: Add two double-digit addends. Again, add one column at a time.
The sum is 33.
