Teaching Ideas #3

Addition Through 20

There are a few tricks that are helpful when teaching addition to 20. Here are a few that helped all my children.

*When adding 9’s to a number up to 10, go back one from that number and say “teen”.

Example: 9 + 4 (go back one number --say "three-teen", or 13"

*When adding 8’s to a number up to 10, go back two from that number and say “teen”.

Example: 8 + 6 (go back to 5, go back to 4, say "four-teen", 14)

*Memorize the doubles

*Learn “doubles plus one” (ex. 6 + 7 is the same as 6 + 6 + 1)

Start slow, work on one trick at a time and master it before moving on to another. Soon, your child will have addition up to 20 memorized.

Have any additional tricks for addition through 20?